Master Lock® Lost/Reset Combination
Combination locks fall into two main types: retrievable and resettable. Retrievable locks have a fixed combination set by the manufacturer, while resettable locks let users change their combination for optimized security.
This blog covers how to retrieve your lost fixed combination padlock and how to reset your combination padlocks.
Recommended Products
Have you forgotten or lost your combination?
A retrievable combination lock has a fixed combination set by the manufacturer, which is unchangeable but retrievable if lost. Locker locks like the Master Lock 1525 combination padlock comes with a preset combination that can be retrieved with the serial number located on the back or on the packaging.
If you've lost your locker lock combination, review how to retrieve your code here.
Need to reset your combination lock?
A resettable combination lock allows the user to set and change their own combination whenever they want, providing heightened security.
This blog covers the following resettable combination lock models:
- Master Lock 175 & 176
- Master Lock 643D
- Master Lock 653
- Master Lock 875 & 975
- Master Lock 1175, 1177, 1178
- Master Lock 1535 & 1535DWD
Master Lock 175 & 176
General Security | 
Solid Brass | 
Advanced Durability
The Master Lock 175 and 176 are both part of Master Lock's line of resettable combination locks, commonly used for a variety of security needs.
Master Lock 643D
General Security | Nickel Plated Steel | Advanced Durability
The Master Lock 643D is a combination padlock with 4-digit dialing that allows thousands of possible numeric combinations. This lock is ideal for securing cabinets, boxes, and other small items.
Master Lock 653
General Security | Laminated Steel | Basic Durability
The Master Lock No. 653D Set Your Own Combination Padlock features a robust 2-inch wide metal body that enhances durability and strength. This model allows for easy setting and resetting of numeric combinations, catering to user preference.
How to change the combination:
This lock is preset at the factory to operate at 0-0-0-0.
- With dials at 0-0-0-0, pull out the shackle
- Turn shackle counterclockwise 90 degree (1/4 turn)
- Continue pressing shackle down and turn another 90 degree (1/4 turn)
- Set the dials to your own combination
- Turn shackle clockwise back to the original 90 degree position, lift and return shackle to closed position
- Be sure to record your NEW combination as you are the only one that knows it!
Master Lock 875 & 975
General Security | Solid Brass | Advanced Durability
The Master Lock No. 875 and 975 are robust padlocks with brass bodies. Both feature resettable 4-digit combinations, providing ample security options without the need for a reset tool. The 875 boasts a roller pin mechanism and shackle seal for weather resistance, while the 975 includes a dual deadlocking feature for enhanced security. View the instruction sheet for how to reset the 875 & 975 locks here
Master Lock 1175, 1177, 1178
General Security | Solid Brass | Advanced Durability
The Master Lock No. 1175, 1177, and 1178 are all sturdy combination padlocks with brass bodies. They feature resettable 4-digit combinations, offering users reliable security with customizable convenience.
Master Lock 1535D & 1535DWD
General Security | Solid Brass | Advanced Durability
The Master Lock No. 1535D, and 1535DWD are modern combination padlocks with durable designs. Each lock offers a user-settable 4-digit combination for personalized security. The 1535D and 1535DWD provide traditional dial combination entry, with the 1535DWD also featuring weather-resistant construction for outdoor use.