The Honeywell Double Cylinder Deadbolt Door Lock features a specially designed pin and tumbler configuration that provides added protection against unauthorized 'bump key' entry. Lock can be easily rekeyed by any locksmith. The deadbolt is keyed on one side. Adjustable latch fits 1-3/8 In. ~ 1-3/4 In. thick doors and 2-3/8 In. ~ 2-3/4 In. adjustable backset. E-Z installation with a Phillips screwdriver when holes are pre-drilled into the door. Package contents include an adjustable latch, mounting hardware, instructions, drilling template and two (2) large head entry keys. Backed by a mechanical and finish limited lifetime warranty.