Indoor padlock is best used as a school locker lock and gym lock, providing protection and security from theft. Set your own directional combination lock for speed and easy combination recall. Faster combination entry than a standard combination lock by using up, down, left, or right directional movements. 2-1/8 in. (54 mm) wide lock body; 1/4 in. (6 mm) diameter shackle with 1 in. (25 mm) length, 3/4 in. (19 mm) width. Set Your Own Directional Combination: Set your own directional combination lock for speed and easy combination recall. Combination can be reset to any number of movements in any sequence. Lock can be opened one-handed without looking for ease of use. Troubleshooting Help: Sometimes, step 3 of the instructions is overlooked. Try entering your old and new combinations in one long string of movements. Enhanced Security: Shimming is defined as violating a lock by inserting a foreign object into the latch mechanism. Master Lock padlocks feature technology specifically designed to protect the latch assembly so there is no target for the shim tool to hit, making the lock more difficult to defeat.