This little cam lock from uxcell is perfect for adding some basic security to cabinets, drawers, lockers, or mailboxes.
The cylinder is 25mm long with a 17.5mm diameter, so it fits panels up to about 18mm thick.

The cam (the rotating part) is 35mm total length.

It's made from zinc alloy with a chrome finish, so it looks clean and resists rust.
Comes keyed different (meaning each lock has its own unique key), and you get 2 keys with it.
The lock rotates 90 degrees - just turn the key to lock or unlock.
Important note: you can only remove the key when it's in the unlocked position.

Installation is simple: drill a hole the right size, insert the lock from the front, put the cam on the back, and tighten the nut.
Works on wood or metal panels.
Great for filing cabinets, tool chests, storage boxes, or even small lockers.

It's not high-security, but it'll keep casual nosy folks out.
For the price, it's a reliable little lock that does what it needs to do.

Just measure your panel thickness before ordering to make sure the 25mm cylinder will work.
Solid basic security for your stuff.