Product Detail Antimicrobial agent prevents growth of bacteria on the surface of the punch. Adjusts to punch 2 to 3 9/32-Inch holes Easy to remove chip tray. Hollow punch mechanism assures a clean punch through of up to 160 sheets Heavy steel construction and 7-year warranty. . The "Stanley Bostitch 2-3 Hole Adjustable Extra Heavy Duty Antimicrobial Hole Punch, 160 Sheet Capacity, Black 03200" is best product for you. We recommended Stanley Bostitch 2-3 Hole Adjustable Extra Heavy Duty Antimicrobial Hole Punch, 160 Sheet Capacity, Black 03200