This very precise drilling jig is designed specifically to guide the drilling bit to cut mortices for door locks and their faceplates. It is quick and simple to set up, self centring and locks onto the door edge securely. It really is a simple process: mark the lock length on to the door, select the width of mortice cutter that suits your lock, set the depth collar, pass the drill shaft through the jig’s guide bush, lock the jig to the door and using power from your drill, drive the carbide tipped mortice cutter into the door moving up and down; repeat process for the faceplate. This produces a very clean smooth cut and is one of the fastest most accurate ways to cut a mortice. You can also use it to cut hinges. Power drill with a 13mm chuck running at speeds 2,000 - 3,000 rpm is recommended. Supplied with 3 special carbide tipped cutters: 19, 22 and 25.4mm covering the most popular lock widths, a shaft for lock up to 100mm in depth and carry case. Other optional accessories available including offset housing kit, longer drill shafts and long drill kit to drill through the end of a door to fit electric locks accurately.