High Quality: The drill bit adopts ultra-hard alloy which makes cutting sharper, unhindered chip removal with super boring capacity 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: Features a "V" locator that operates off a center reference line and quickly locates center points of drilling for any the hinge and mounting plate marks 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 clean operation at home, even if you are not professionals, you can quickly locate the center points of drilling for hinges and mounting plates. Multiple use: suitable for drill press, drill press drill, bench drill, vertical drill, hand-held electric drill, stand motor drill and moving tape type magnetism drill, etc. The drill guide is widely used, what i is suitable for carpentry DIY or professional engineers.