High Quality: The drill bit adopts ultra-hard alloy which makes the cutting sharper, unhindered chip removal with outstanding boring capacity and excellent boring performance. Hinge Hole Cutter: The boring diameter is 35mm. The special removable depth stop design makes drilling easier. Concealed Hinge Boring Jig: Includes a V-locator that works off a center reference line and quickly locates drilling center points for all brands of hinges and mounting plates. Easy to Use: Easily and conveniently dip the cup hole on the cabinet door or desk by yourself with the hinge drilling jig, suitable for their own operation at home, even if you are not professionals, you can quickly locate drilling center points for hinges and mounting plates. Multiple Use: Suitable for drill press, pistol drill, bench drill, vertical drill, hand-held electric drill, stand motor-driven drill and mobile ribbon-type magnetism drill, etc. The drill guide is widely used, which is suitable for the Carpentry DIY