Kwikset Security, Polished Brass Finish, Easy To Install, Fits Standard Door Prep, Exposed Screws On The Interior Knob,Smart Key Security With Bump Guard Protection, Patented Side Locking Bar Technology Offers Improved Security By Protecting Against Lock Bumping, An Attack Technique Used To Defeat Conventional Pin & Tumbler Locks, Smart Key Security Re-KeyTechnology Is Compatible With Kwikset KW1 Keyway, Lifetime Mechanical & Finish Warranty, Keyed In Sets Of 3, Box Pack.