Material: aluminum alloy, cylinder material: brass, round hole diameter: 50-62mm. Adjustable latch (the distance from the center of the hole to the edge of the door) - 60mm or 70mm; Suitable for door thickness: 35mm to 45mm. Anti-collision bearing design effectively facilitates the closing of the buffer. For use in external doors and internal doors where key access and security are required. This door lock can be locked inside or locked outside. When bolted inside, it can be unlocked with the key from outside.