Ryobi A99DLK3 3-Step Wood Door Lock Installation Kit with Auto-Strike Locator for Deadbolts and Locksets ALL-IN-ONE: You only need a drill and chisel in addition to this kit to accurately set lock sets or deadbolts without taking measurements AUTO-STRIKE LOCATOR helps you center the strike plate where you feed your lock FITS ON 1-3/8 inch and 1-3/4 inch thicknesses on doors EASY-TO-FOLLOW INSTRUCTIONS so even the least experienced DIYer can get their locks installed properly INCLUDES: Plastic A99DLK3 unit, 1 inch spade bit, 1-1/2 inch carbon hole saw, 2-1/8 inch carbon hole saw, arbor with pilot bit, 1/8 inch brad point drill bit, 3/32 inch drill bit, ph2/8-10sl double ended bit, instructions