Professional quality 35mm bit featuring durable and hard-wearing carbide tips, ideal for drilling flat-bottomed holes. Specially designed for use with the Concealed Hinge Jig for drilling the 35mm cup holes with a hand-held drill. Spiral flute construction allows for fast chip removal. For use with a drill press, hand drill and exclusive Rockler JIG IT® Drill Guide (sold separately). Carbide tipped for long lasting performance and clean 35mm holes. 9.5mm (3/8") diameter shank.