Spyder's Door Lock Hole Saw Kit utilizes the Rapid Core Eject system to easily drill a straight, accurate hole, every time. The deep metal bushings accurately guide the pilot drill and won't wear out like other plastic fixtures. The Clamp-On Quick Connect Design makes installation clean and easy. This kit uses Spyder's bi-metal hole saws to make clean holes through various door materials, including hardwood, hollow core, and steel, up to 1-3/4-inches thick, and includes an accessory depth stop to prevent backside blowouts. Easily remove cores and change hole saw sizes without any additional tools. At Spyder, we don't just make tools—we redefine what's possible. Built for those who demand the best, our power tool accessories deliver unmatched performance, innovation, and durability.