Premium quality: the drill bit is made of carbide alloy, which makes the cut more clean, the blade is characterized by high precision, smooth cutting operation, good impact resistance Concealed Hinge Bore Jig: Features a 'V' locator that works from a center reference line, easily locates the center points of hinges and mounting plates, hole position is accurate Easy to Use: Easily dip the cup hole on the cabinet door or desk by yourself with the hinge drilling jig, even if you are not professionals, you can locate drill center points easily and quickly. Suitable Size: Bore diameter is 35mm, suitable for 35mm concealed hinge. Package Contents: 1 Positioning Device and 1 Forstner Drill Bit, ideal for drilling hidden hinges and locks Versatility: Suitable for drill press, bench drill, vertical drill, etc. All wood and wood products, plastic, plywood and other materials you need for exquisite punching, suitable for industrial hinge installation, wood processing and maintenance, model production, etc. .