1.High quality: The drill bit adopts ultra-hard alloy which makes cutting sharper, chip removal unhindered with outstanding reaming capacity and excellent reaming performance. 2.Hinge hole cutter: bore diameter is 35mm.Special removable depth stop design makes drilling easier.3.Concealed Hinge Boring Jig: Features a V locator that works off a center reference line and quickly locates drilling center points for all brands of hinges and mounting plates4.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 don'tIf you're not a professional, you can quickly locate drilling center points for hinges and mounting plates.5.Multiple use: suitable for drill press, pistol drill, bench drill, vertical drill, electric hand drill, stand motor drill and magnetism drillmovable tape type, etc.The drill guide is widely used, which is suitable for carpentry DIY or professional engineers.