Standardized letterbox lock in steel, quality chrome metal alloy Cam lock for letterbox sheet metal door. Glitter Barrel 25mm body length, M18 diameter Delivered with 16 keys and 8 camshaft barrel parts Fits most mailboxes, drawers, cabinets, closets Mailbox Cylinder Material: aluminum alloy. Body length: 25mm. Head diameter: 18mm. Small and safe: For mailbox, drawer, closet. Included in delivery: 8 * Standard Mailbox Lockeach lock has same keys16*keys. Note: This lock is not post approved. If you are not satisfied with the products when you receive the package. You can contact us at any time, we will offer you a good solution.To ensure security, the key can only be removed in the locked state. Install a new lock Place the cylinder in the door Carry out a test with the key to position the cylinder correctly and check that the door can be closed Then screw the nut with a wrench and tighten well Your new lock is correctly installed