Diecast Brass, Night Latch and Locking CylinderThis is a brass painted diecast locking unit and keeper, with hold open feature and spring latch for automatic locking. Has 5 pin tumbler cylinder and requires a 1 1 4 in. bore. Uses a Kwikset keyway. For use on 1 3 8 in. to 2 3 8 in. thick doors, with a 2 9 32 in. backset. California residents see Prop 65 WARNINGS For use on doors that are 1 3 8 in. to 2 3 8 in. thick 2 9 32 in. backset Ideal as a replacement lock cylinder for rim cylinder style