Quality Plunger Locks: Constructed with Zinc alloy material with bright chrome finish, features rust-proof and corrosion resistant for more durability useEasy Use Tubular Lock: High security tubular lock and key retaining, key is removable only in the locked position; In unlock status, you can simply push on the spring loaded cylinder to lock and requires no keysTubular Locks Dimension: The Cylinder diameter is 3/4(19mm), the plunger outer diameter is 9/10(23mm), overall length 1-1/2(38mm). Recommended hole size 3/4(19mm)Widely Used: This tubular push lock is perfect for merchandise showcases, drawer, sliding doors, cabinets, etc, also can be used as bicycle disc brake lockPush Locks Keyed Alike: Comes with 3 PCS tubular push locks, each lock with 2 keys alike