【WIDELY USED AND EASY TO USE】DUEBEL door lock installation kit is suitable for drilling lock holes on the front and side of doors, replace fingerprint lock, door opening slot, door frame lock tongue groove, unlocking hole, open eccentric hole, replace the large lock body, etc. The mortise lock jig is easy to use. If you are new users, suggest you to practice on the old wooden door first. Precision mortise tool kit is a good time-saving item for DIY remodelers and contractors. There is an operation video for your reference. 【NEWLY UPGRADED STYLE】1.Enlarged pressure plate; 2.Size adjustment scale; 3.Rubber skin protection; 4.Hexagonal clamping is more stable. 【NEWLY UPGRADED STYLE】5.Quick compression device; 6.(7-shaped slide track); 7.(4 track bearings); 8.The knife holder assembly is detachable, and the blade head is easy to replace. 【3 CUTTER BITS: 18/20/22 MM】Our door latch mortise tool has 3 different hole cutters (Sizes: 18/20/22 mm) made of Tungsten Carbide (TC) steel, higher quality over high-speed steel. It firmly grips most any thickness wooden door. Applying vertical guides with height and depth stops, overrun cutting area will be avoided by using this tool set. 【EASY TO CARRY】The door lock hole opener kit is made mostly of steel, comes with a pair of leather gloves, woodworker chisel (size: 18mm), 2 external hex wrenches, 1 L-shaped internal hex wrench, total weight with case: 12.23 lb (5.55 kg). The mortise jig comes in a large black canvas bag, easy to carry, convenient for travel. Bag size: 54 * 20 *23 cm (21.25 * 7.87 * 9.05 inch)., Weight: 12.235655541 pounds, Manufacturer: DUEBEL