High Quality: The drill bit adopts ultra-hard alloy which makes the cutting sharper, unhindered chip removal with super boring ability and excellent boring performance.Hinge Hole Cutter: the bore diameter is 35 mm. Special removable depth stop design makes drilling easier. Concealed Hinge Bore Jig: Includes a inchVinch locator that works off a center reference line and quickly locates drill center points for all brands of hinges and mounting plates Easy to use: easily and conveniently dip hole of the cup on the cabinet door or desktop by yourself with the hinge drilling jig, suitable for their own home operation, even if you are not professionals, you can quickly locate the center points for hinges and mounting plates.Multiple use: suitable for drill press, pistol drill, bench drill, vertical drill, hand electric drill, the stand-mounted motor drill and moving ribbon type magnetism drill, etc. The drill guide is widely used, which is suitable for carpentry DIY or professional engineers. Features: 1. Quick Hinge Installation Jig The hinge drill guide can help you quickly drill the perfect concealed hinge hole. Suitable for positioning and installing furniture door cabinet hinges 2. 35mm Hinge Hole Saw Jig ABS plastic hinge hole jig, lightweight and portable, easy to use. How to use: 1. Determine the position of the hinge cup, the short board facing up, the screw is fixed on the edge of the board, drill the hinge cup hole. 2. Draw a corresponding center line on the other board, the short board is facing down, the center line is aligned with the inverted triangle,drill the hinge base positioning hole.3. Install the hinges. Specifications: Material: ABS Hole: 35mm Size: 77*66mm Package Included: 1x 35mm Hinge Drilling Jig + Forstner Drill Bit Set.