This Mailbox Lock by Prime-Line Products is a diecast constructed cylinder lock that comes with a brass-plated face and brass pins. This lock is designed to replace a variety of manufacturer's original equipment product, and it rotates a full 90 degrees counter-clockwise to open. This mailbox lock replaces locks on mailboxes manufactured by Auth-Electric, Bommer and others. This lock features a 7/8 in. outside diameter and three cams. Includes 1 lock and 2 keys. Designed as a mailbox lock Fits Auth-Electric mad Bommer locks Includes 3 cams for installation Brass construction with steel cams Has a 7/8 inch diameter All the necessary mounting hardware is included for a quick and easy installation Easy to install in less than 30 minutes with a few simple tools Please refer to the line art drawing for dimensions and compare with your needs before ordering (not universal)