Decoding Multi-Wheel Locks with a Mini Knife
There are other videos online already that discuss this tactic, but they mostly appear to appeal to experienced lockpickers and locksmiths... as you all know, I like communicating facts like this to the masses so here's my take on multi-wheel decoding.
It's possible to fabricate a decoding shim out of any found metal if it's thin enough (on some, but by no means all, locks the aluminum from a beverage can can work in a pinch) but for best results we recommend using a proper steel tool.
Our students use either of the following in our classrooms...
https://redteamtools.com/quick-entry/ez-decoder-shim
https://redteamtools.com/quick-entry/ultra-decoder-master-175-bypass-tool
...so if you've got a key box or other combination-based lock to which you've lost the code, try this tactic and see how it works out for you! Most of the Master Lock 5400-series key boxes are susceptible, as are Sesame multi-wheel locks, ShurLok products, Brinks locker locks, and a whole galaxy of no-name knock off products which are clones of the units that dominate the market.
Good luck!