Q. How does a combination lock function?

Answer

A combination lock is similar to a lever lock in that it operates by a series of numbers rather than by a physical lever. Tumblers with slots in them allow a fence to retract; unlocking the bolt once the tumblers are in the correct position. Every single one of these wheels is covered in wheel flies. The first wheel is rotated by the drive pin until it makes contact with the wheel next to it. This process is repeated until all the cogs are turning. Picking up the wheels is what a user does at this point. One notch is cut into each wheel on the spindle. When the dial is set to the correct position the notches in each wheel align with one another.