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Master Lock 178D Set Your Own Combination Lock, 1 Pack, Black

4.6 4.6 out of 5 stars 14,848 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
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Combination Lock, 1 Pack
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Purchase options and add-ons

Brand Master Lock
Special Feature Resettable Combination Lock
Lock Type Combination Lock
Item dimensions L x W x H 1 x 2 x 2.91 inches
Material Steel, Diecast

About this item

  • Indoor and outdoor padlock is best used as a school locker lock, gym lock, and gate lock, providing protection and security from theft.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
  • Set your own four-digit combination lock for easy combination recall; Combination change tool included
  • Combo lock is constructed with a solid body for strength and weatherability, hardened steel shackle for cut resistance
  • 2 inch (51 millimeter) wide lock body; 5/16 inch (8 millimeter) diameter shackle with 1 inch (25 millimeter) length, 1 inch (25 millimeter) width
  • Shackle is preset to open on 0-0-0-0. Some instructions may incorrectly state shackle opens on l-o-c-k. See user manual in technical specifications section of this page for correct combination reset instructions.
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From the manufacturer

combination lock, master lock, combo lock, padlock combination, master lock combination, gate lock

Master Lock 178D Set Your Own Combination Padlock

Cut Resistance

Heavy Duty

Hardened steel shackle for extra cut resistance.

Weather Resistance

Outdoor Use

Combination lock is best used as a gate lock, gym lock, or locker lock.

Combination Padlock

Easy To Set & Reset

The four-digit dial allows for thousands of possible numeric combinations.

Master Lock For Everything Worth Protecting

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Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Master Lock 178D Set Your Own Combination Lock, 1 Pack, Black


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Product Description

The Master Lock 178D Set Your Own Combination Padlock features a 2in (51mm) wide solid body for strength and reliability. The 5/16in (8mm) diameter shackle is 1in (25mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-digit dialing allows for thousands of possible numeric combinations. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.

Top Brand: Master Lock

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Master Lock 178D Set Your Own Combination Lock, 1 Pack, Black
Master Lock 178D Set Your Own Combination Lock, 1 Pack, Black
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Price-14% $18.49
Typical:$21.45
$23.99$170.05-30% $6.99
Typical:$9.99
$10.98$9.62
Delivery
Get it as soon as Saturday, Jan 11
Get it as soon as Saturday, Jan 11
Get it Jan 16 - 21
Get it as soon as Saturday, Jan 11
Get it as soon as Saturday, Jan 11
Get it as soon as Saturday, Jan 11
Customer Ratings
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Customer reviews

4.6 out of 5 stars
14,848 global ratings

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Customers say

Customers find the lock easy to use and set a combination with. They appreciate its sturdy construction and reliable performance. Many find it convenient to program the same code and open quickly. The lock serves its intended purpose well and operates smoothly, even in harsh weather conditions. However, opinions differ on its value for money and weather resistance.

AI-generated from the text of customer reviews

998 customers mention "Lock quality"747 positive251 negative

Customers appreciate the lock's quality. They find it simple to use, sturdy, and easy to set a combination. The lock allows them to secure items like ATVs to trucks and luggage in lockers. Customers also mention that it's easy to close the lock without having to set the dial.

"Great Lock, combination is easily turned, shackle is thick(not easily cut) and made heavy duty material!..." Read more

"I bought this for traveling around Europe and locking my luggage in hostel lockers. For its use it was perfect...." Read more

"...the weight of a standard master lock, which makes me feel my belongings are more secure. And, it has given me ZERO problems in the gym...." Read more

"...shed door duty and I just recently replaced it after the locking mechanism began acting up on a consistent basis — issue was occurring after..." Read more

855 customers mention "Build quality"693 positive162 negative

Customers appreciate the lock's sturdy and reliable build quality. They find it made of heavy-duty material that is not easily cut.

"...is easily turned, shackle is thick(not easily cut) and made heavy duty material!..." Read more

"...Other than that the lock is heavy duty and more than enough to at least deter any theft." Read more

"...Also, it was made out a stronger, heavier metal that I felt would hold up to the test of time...." Read more

"...Definitely recommend, it’s a solid lock at a good price point." Read more

666 customers mention "Ease of use"606 positive60 negative

Customers find the lock easy to use. They say it's simple to set a combination and program it to the same code. The combination wheels are fine, and changing the combination is straightforward.

"Great Lock, combination is easily turned, shackle is thick(not easily cut) and made heavy duty material!..." Read more

"...And I am glad that I did. The combination feature is convenient...." Read more

"...Easy to program the code you want use. I think maybe just for good measure i'll lightly oil it this year before winter sets in...." Read more

"...Summary – I am using these on my two sheds. The combo is easy to set...." Read more

625 customers mention "Works great"506 positive119 negative

Customers find the lock easy to program and reliable. It serves its intended purpose well, even in outdoor conditions. Some customers mention it works reliably indoors and against normal people.

"...And, it has given me ZERO problems in the gym...." Read more

"...They work great and I like not having to keep track of keys...." Read more

"Use it for my gym locker and worked well until it wouldn’t lock as I tried to push the lock shut. Tried silicone spray but didn’t help...." Read more

"This lock worked well enough in the warm weather, even though the combinations would get stuck sometimes. Little oil helped...." Read more

217 customers mention "Value for money"145 positive72 negative

Customers have different views on the lock's value for money. Some find it acceptable and worth buying, while others consider it a waste of money. The price seems too high for a simple gym lock.

"...Definitely recommend, it’s a solid lock at a good price point." Read more

"...The value of this is locks no justification needed. It’s a bargain!" Read more

"...So, for the price, this lock is not worth buying it. It looks and feels sturdy and all but it didn't even make it through a school year...." Read more

"Nice quality and price" Read more

179 customers mention "Weather resistance"100 positive79 negative

Customers have mixed opinions about the lock's weather resistance. Some say it's weatherproof and can withstand outdoor temperatures and weather, while others mention it's not rated for outdoor use and is not safe at all for outdoor use.

"...-Unlike a lot of locks, this is a very well built solid lock designed for outdoor use...." Read more

"...Not recommended for outside use if you plan to use it in the cold. See the corrosion in my picture after less than six months of use." Read more

"...Not these Master locks (178D and 175D). These are a great choice for outdoor sheds, gates, or gym lockers...." Read more

"...You do need to lubricate them because they do get water in around the shackle and can freeze in cold weather. Yes, I would buy these again." Read more

What a great secure lock
5 out of 5 stars
What a great secure lock
This a lock has all features secure, sturdy, good size. I use this to lockdown kayak trailer. The combo dials feel a bit sticky, but after a small drop of lubricant, it’s smooth. I will change all my keyed locks to this combo style. I went to HD to look for this, but it’s not available. Others style locks cost more. The value of this is locks no justification needed. It’s a bargain!
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Top reviews from the United States

  • Reviewed in the United States on August 16, 2024
    Style: Combination Lock, 4 PackVerified Purchase
    Great Lock, combination is easily turned, shackle is thick(not easily cut) and made heavy duty material! Perfect idea that you must have a key to change the combination(even if left open the combination can not be changed unless the key is engaged). Note you must have at least one of the combination numbers moved to a different number than the set combination in order to close the shackle(shackle will not close and lock with combination is in the correct order) also when turned to the correct combination the shackle must be depressed in order to release.
    *** check the size of the area/hole that the shackle will be place, this one is thick.
    Customer image
    5.0 out of 5 stars Superb Lock
    Reviewed in the United States on August 16, 2024
    Great Lock, combination is easily turned, shackle is thick(not easily cut) and made heavy duty material! Perfect idea that you must have a key to change the combination(even if left open the combination can not be changed unless the key is engaged). Note you must have at least one of the combination numbers moved to a different number than the set combination in order to close the shackle(shackle will not close and lock with combination is in the correct order) also when turned to the correct combination the shackle must be depressed in order to release.
    *** check the size of the area/hole that the shackle will be place, this one is thick.
    Images in this review
    Customer image Customer image Customer image Customer image
    Customer imageCustomer imageCustomer imageCustomer image
    One person found this helpful
    Report
  • Reviewed in the United States on November 14, 2024
    Style: Combination Lock, 1 PackVerified Purchase
    I bought this for traveling around Europe and locking my luggage in hostel lockers. For its use it was perfect. The only issues I had were lockers with too small a lock opening for the bolt on this lock to fit through. Other than that the lock is heavy duty and more than enough to at least deter any theft.
  • Reviewed in the United States on May 20, 2016
    Style: Combination Lock, 1 PackVerified Purchase
    I looked at lock after lock when deciding which to buy for my gym locker. It seemed like every lock had decent reviews but two common complaints: (1) it could easily be popped with a trick you can learn by watching a YouTube video, and (2) it did not stand the test of time. Eventually, I decided on this lock. It promised that it would be more effective at securing my belonging as it would not be popped because there is not key hole. Also, it was made out a stronger, heavier metal that I felt would hold up to the test of time. Some of the reviews seemed to suggest otherwise, but with no perfect lock out there I decided to give it a shot. And I am glad that I did. The combination feature is convenient. The lock is twice the weight of a standard master lock, which makes me feel my belongings are more secure. And, it has given me ZERO problems in the gym.

    The only thing I might warn about is that the upper loop is heavier than most locks--meaning that the circumference is larger. As such, it might not fit all lockers. I use a standard gym locker and have not problem. However, if it was even slightly larger, I am not sure it would fit.
    2 people found this helpful
    Report
  • Reviewed in the United States on July 15, 2021
    Style: Combination Lock, 1 PackVerified Purchase
    Have a few of these outdoors (in Phoenix heat) on various things and most importantly my tool shed. They work great and I like not having to keep track of keys. My oldest of the locks saw roughly 5 years of shed door duty and I just recently replaced it after the locking mechanism began acting up on a consistent basis — issue was occurring after scrambling the combo it should lock closed with a simple press but it was no longer catching the mechanism without holding the shackle into lock body and then would have to proceed to scramble the combo at the same time for it to catch, still worked but got tired of it and finally just replaced. Haven't noticed signs of rust on any of them at any point. Maybe once a year I spurt some silicone lubricating spray into the mechanism to keep the action smooth. Definitely recommend, it’s a solid lock at a good price point.
    3 people found this helpful
    Report
  • Reviewed in the United States on March 9, 2024
    Style: Combination Lock, 2 PackVerified Purchase
    Use it for my gym locker and worked well until it wouldn’t lock as I tried to push the lock shut. Tried silicone spray but didn’t help. Just got a new one.
  • Reviewed in the United States on August 30, 2024
    Style: Combination Lock, 1 PackVerified Purchase
    definitely water/Freeze proof.
    It's been used on my Barn door for a couple of years and no problems of any sort.
    Easy to program the code you want use.
    I think maybe just for good measure i'll lightly oil it this year before winter sets in.
    It's well made as well. once you turn the numbers to unlock it it doesn't automatically pop open, that's one way people are able to open combo locks.
    2 people found this helpful
    Report
  • Reviewed in the United States on October 8, 2024
    Style: Combination Lock, 2 PackVerified Purchase
    This a lock has all features secure, sturdy, good size. I use this to lockdown kayak trailer. The combo dials feel a bit sticky, but after a small drop of lubricant, it’s smooth. I will change all my keyed locks to this combo style. I went to HD to look for this, but it’s not available. Others style locks cost more. The value of this is locks no justification needed. It’s a bargain!
    Customer image
    5.0 out of 5 stars What a great secure lock
    Reviewed in the United States on October 8, 2024
    This a lock has all features secure, sturdy, good size. I use this to lockdown kayak trailer. The combo dials feel a bit sticky, but after a small drop of lubricant, it’s smooth. I will change all my keyed locks to this combo style. I went to HD to look for this, but it’s not available. Others style locks cost more. The value of this is locks no justification needed. It’s a bargain!
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
  • Reviewed in the United States on March 7, 2016
    Style: Combination Lock, 1 PackVerified Purchase
    This is a review of the Master Lock 178D Set Your Own Combo Padlock.

    I will do my normal list of specs-cool features and then list a summary as to my thoughts after using.
    -This is made of die cast metal and has a black finish to help protect it from the outside elements.)
    -It has a 2” wide die cast case and a 1” shackle. Diameter of the shackle is 5/16”.
    -Comes with 1 change key.
    -Operate by using a four digit number combination you set.
    -Unlike a lot of locks, this is a very well built solid lock designed for outdoor use.
    -To use, enter the combo and push down the shackle and then pull it up to unlock.

    Summary – I am using these on my two sheds. The combo is easy to set. You simply unlock the lock – open the shackle, insert the key – turn 90 degrees, set the combo of your choice and then remove the key. I really like this feature as I wanted my two sheds to have the same combo so I do not forget and for simplicity. The movement of the dials has a slight clicking and bump feel as you move the numbers vs. being an easy roll. (Might get smoother with time.) I like this as it is easy to lock your digits in and know they are aligned right. Whatever you do, do not forget the combo. The key is only for changing the code and will not open the lock. I am very happy with this lock and all master locks in general so far. Good make and reliable. Highly recommend.
    Customer image
    5.0 out of 5 stars Great for sheds.
    Reviewed in the United States on March 7, 2016
    This is a review of the Master Lock 178D Set Your Own Combo Padlock.

    I will do my normal list of specs-cool features and then list a summary as to my thoughts after using.
    -This is made of die cast metal and has a black finish to help protect it from the outside elements.)
    -It has a 2” wide die cast case and a 1” shackle. Diameter of the shackle is 5/16”.
    -Comes with 1 change key.
    -Operate by using a four digit number combination you set.
    -Unlike a lot of locks, this is a very well built solid lock designed for outdoor use.
    -To use, enter the combo and push down the shackle and then pull it up to unlock.

    Summary – I am using these on my two sheds. The combo is easy to set. You simply unlock the lock – open the shackle, insert the key – turn 90 degrees, set the combo of your choice and then remove the key. I really like this feature as I wanted my two sheds to have the same combo so I do not forget and for simplicity. The movement of the dials has a slight clicking and bump feel as you move the numbers vs. being an easy roll. (Might get smoother with time.) I like this as it is easy to lock your digits in and know they are aligned right. Whatever you do, do not forget the combo. The key is only for changing the code and will not open the lock. I am very happy with this lock and all master locks in general so far. Good make and reliable. Highly recommend.
    Images in this review
    Customer image Customer image Customer image
    Customer imageCustomer imageCustomer image
    47 people found this helpful
    Report

Top reviews from other countries

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  • Salvador Torres
    5.0 out of 5 stars Candado
    Reviewed in Mexico on November 4, 2024
    Style: Combination Lock, 1 PackVerified Purchase
    Excelente calidad
  • MGJS
    5.0 out of 5 stars Great
    Reviewed in Canada on October 4, 2024
    Style: Combination Lock, 2 PackVerified Purchase
    Great lock, easy to set combo.
    Feel heavy.
  • Digs
    5.0 out of 5 stars Fantastic lock
    Reviewed in the United Kingdom on November 20, 2024
    Style: Combination Lock, 1 PackVerified Purchase
    I bought this a few months ago for my locking up my shed. I wanted a coded lock to avoid having another key. The lock is very sturdy and secure and absolutely no rust so far. Very happy with my purchase
  • Arvind Bamhi
    5.0 out of 5 stars Excellent Quality Lock
    Reviewed in India on February 26, 2024
    Style: Combination Lock, 1 PackVerified Purchase
    The Lock is of Very Good Quality...Heavy and Strong....This is the first time I ever purchased such a good lock...
  • Hamdan
    5.0 out of 5 stars Fast and clean products
    Reviewed in Saudi Arabia on November 30, 2023
    Style: Combination Lock, 1 PackVerified Purchase
    Awesome not enough