Heavy Duty Screw Punch - This heavy duty screw punch puts perfectly clean holes into board and paper for bookbinding. The tip is replaceable; and there are different sized tips available. The tip that is included will punch out a 1/8" diameter hole. Simple to use- just place the tip where you want to punch a hole, and press down firmly. The screw action of the tool drives the sharp round blade tip easily into your board or paper. Solid wood and brass construction. Precision made in Japan.