Search  for anything...
Master Lock

Master Lock Combination Padlock Weather Resistant Lock Black 4-Pack 178EC4

  • Based on 14,595 reviews
Condition: New
Checking for the best price...
$52.65 Why this price?
Save $4.20 was $56.85

Buy Now, Pay Later

As low as $8.78 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Sep 24
Order within 6 hours and 25 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Number of Items: 4


Features

  • Indoor and outdoor padlock is best used as a school locker lock, gym lock, and gate lock, providing protection and security from theft
  • 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
  • Includes four set your own combination locks
  • Shackle is preset to open on 0-0-0-0.

Description

The Master Lock 178EC4 Set Your Own Combination Padlocks feature 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. Includes four set your own combination locks. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.

Brand: Master Lock


Special Feature: Padlock


Lock Type: Combination Lock


Item dimensions L x W x H: 0.96 x 2 x 2.91 inches


Material: Alloy Steel


Brand Name: Master Lock


Recommended Uses For Product: Security


Number of Pieces: 4


Included Components: Combination Padlock 4 pk


Model Number: 178EC4


UPC: 071649370571


Model Name: Combination Padlock 4 pk


Global Trade Identification Number: 71


Manufacturer Warranty Description: Limited Lifetime Warranty


Number of Items: 4


Manufacturer: Master Lock


Item Type Name: Combination Padlock 4 pk


Manufacturer Part Number: 178EC4


Additional Features: Padlock


Lock Type: Combination Lock


Controller Type: Hand Control


Control Method: Touch


Style Name: Set Your Own Combination, 4 Pack


Color: Black


Shape: Rectangular, Square


Material Type: Alloy Steel


Finish Types: Polished


Item Dimensions: 0.96 x 2 x 2.91 inches


Item Weight: 1.38 kg


Item Highlight: Resettable Combination Lock For Gym Lockers, Gates, Sheds, Cabinets, Storage and School Use, Indoor/Outdoor, Black, 4-Pack


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Sep 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Almost 7 years later still going strong
Number of Items: 1
Review Image by Rico
I beams out in my yard and noticed the two padlocks on my gates. I open them about 4 or 5 times a year and don’t oil the padlock or do any maintenance. They’re just left out in the weather year round and they always work. When I saw them today I realized it had been a long time since I bought them and thought how nice it is that a product actually lasts and I don’t have to think about it ever, much less replace it. So I looked it up and I bought both in August 2018 and here it is almost 7 years later and they still work great and don’t show any signs of wear besides some minor fading. That is what I call a fine product and there aren’t too many out there nowadays since everything became disposable, so I wanted to write this long overdue review since it’s so remarkable to me. Now I will say, they cost $9.49 back in 2018 so the price has doubled, which isn’t great, but that’s the way of things too nowadays so there’s no sense complaining I’m just really happy there are a few solid products still being made out there, and this lock is definitely one of them. ... show more
Reviewed in the United States on February 10, 2025 by Rico
    • I bought two to replace old versions of the same product
Number of Items: 1
We lock our front and back gates with these locks. They are in the elements, unprotected from sun/rain. The last ones (same model) were in service since 1994(!), and were good reliable easy to use locks. They were 'used' (unlocked/locked) several times a week. I decided to replace them because the numbers on the combination wheels were becomming a bit corroded and difficult to read, they were getting more difficult to turn (not that bad though), and the lock mecahnism wasn't working as well as it used to. Sometimes the lock didn't latch when locking, and you had to bang it on the gate to get it to latch. I tried lubricating the locks with triflow, which helped for a couple weeks, but then became stingy again. I thought that after 19 years, I could afford to buy a couple more. So I've been using the two replacements for a month now, and they're great. The numbers are easier to read, the wheels are easy to turn, and the lock mechanism works perfectly. I assume these will last ~20 years like the last set. By the way, it's a bit counter-intuitive, but to open the lock, set the dials to the combination, then push the shackle *IN* to disengage the lock. Some people set the number, then pull, but that's not it works. ... show more
Reviewed in the United States on January 15, 2013 by Gadget Fanatic
    • Decent combination lock.
Number of Items: 1
Seems like a good quality padlock. I like the fact that you can set your own combination. No more remembering some abscure random numbers. Time will tell on the durability.
Reviewed in the United States on May 22, 2026 by Stephen R. Hardison
    • Great customer support
Number of Items: 1
Update: I called Master Lock. They took responsibility and promptly replaced the lock at no expense to me. Upgrading from 1 to 4 stars on faith that this replacement will perform up to Master Lock's usual high standards. Will return to update this review if that proves not to be the case. --- Old review: This lock didn't make it through a single Ohio winter. I needed to get into the shed in January and couldn't get the lock open. Eventually a lot of pushing and pulling worked. Then it wouldn't lock again, even after I brought it inside for a week to warm up. Unreliable. Avoid. ... show more
Reviewed in the United States on February 8, 2024 by Ken
    • Works well for pre-teens
Number of Items: 1
I bought this because my 12 year old was struggling with the one bought locally- this one was recommended online and it has worked very well
Reviewed in the United States on May 28, 2026 by sharon forquer bonnett
    • Great lock
Number of Items: 4
Great locks, easy to use, reliable and strong.
Reviewed in the United States on July 26, 2026 by cre612
    • Great for sheds.
Number of Items: 1
Review Image by Randy
Review Image by Randy
Review Image by Randy
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. ... show more
Reviewed in the United States on March 7, 2016 by Randy
    • Good quality
Number of Items: 4
Love them, I used them for my Milwaukee boxes and the color looks pretty cool
Reviewed in the United States on July 24, 2026 by Ivan Castillo Flores

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...