Simple but Practical The door lock jig kit includes a mortiser 3 M10 cutters 2 keys a ruler a plastic case and 10 other accessories. It has a simple construction but is convenient in drilling. Rigid and Sharp Cuts: The mortise lock fixing jig will come with 3 tungsten steel cutters, 0.79"/0.87"/1" (18/22/25mm) sizes. They are sturdy and sharp enough to make clean cuts. Ease of Installation: The DBB lock mortiser is easy to assemble and install on the door, even for beginners. With simple marks on the door and a power drill, you can do this easily. Excellent Performance: The door lock mortiser kit features parallel slides that can fully clamp the door, ensuring a stable drilling process. Various Use: The mortise jig is used on wood and aluminum doors with a thickness of 5.3"/13.5cm. It is suitable for installing hotel doors and security doors or doors. door lock modification.