Quantity : 2 pieces Specification: 20mm single opening High quality material: The mailbox lock is made of high quality zinc alloy, which is rustproof, corrosion resistant and wear resistant. strong and robust. Can be used for a long time. Wide range of uses: metal cabinet locks are used in mailboxes, desk drawers, cabinets, office display cabinets, drawers, desks , jewelry boxes, tool box locks, etc. With 2 Keys: The cabinet lock comes with two identical keys, each key will work on any lock you purchase on this listing. Protection and Privacy: Cabinet locks not only increase the security of your important items, but also protect your children from dangerous items like sharp tools and inedible cleaning products. EASY INSTALLATION: Our tubular cam locks are easy to install, drill holes in the appropriate places, insert the lock head and secure the cam with the set screw.