16.5mm Hinge Boring Bits 70mm Long

Carbide Tipped Hinge Boring Bits or Forstner Bits are designed for created larger recess holes typically for hardware hence the name Hinge Bit The bit’s geometry has a center point and edge spurs that give stability when making the recess allowing for clean, straight holes. The bit also includes a high setting screw on the bottom of the shank as well as a flat to help facilitate set screw clamping. These drills can be used in a CNC machine with a drill adapter that converts the flat shank into a cylindrical shank. For heavy production uses please see our Diamond Hinge Boring Bit