... material:zinc alloy 3.black color,durable 4.waterproof,dustproof 5.use for hotel lock 1.Adopting international standards' 5 tongue of ... is of dust-proof, waterproof.3. Unique indoor insurance tongue, lock without disturb4.Square Tongue (anti-bolt) has be strengthened. The ... , fire doors and other large doors.1.ANSI standard lock body2.material:zinc alloy3.black color,durable4.waterproof,dustproof5.use ...