Hummer Heavy-Duty 32-Sheet Capacity Adjustable Punch, Replacement Punch Heads Letter size sheet capacity is based on 20-lb. bond. Margin depth adjusts up to 3/4". Inch and metric scales. Adjustable centers from 13/16" to 8-1/2". Accepts up to nine punch heads, three included. Removable chip tray. Gray steel. Replacement Punch Heads For Hummer Heavy-Duty Adjustable Punches, Models 271-1/2 & 272-1/2 (GBC9800276/GBC9800277), both sold separately. 11/32" Diameter Leinbach Post Hole Diggers
Additional Information

Punch Heads fit GBC Hummer Punch Bases and allow you to customize their punches. Made of high-strength zinc alloy.