Combi-Cam 7803S-BLK 4-Dial Combination Cam Lock with 5/8" Cylinder and Black Finish - Pack of 10 Comes with 5/8" cylinder length that fits a material thickness up to 3/8" This high security Combi-Cam is easy to operate and requires no special tools to set up Ability to install in non-resettable mode and retrofits any standard cam lock The 4-Dial Combi-Cam increases cabinet security with 10,000 possible combinations Perfect for mailboxes, healthcare, education, gyms, school lockers, drawers or doors