Precision-ground all-steel punch heads make quick, clean hole-punching easy. Strong steel oversized handle allows for an easy open-handed grip and powerful punching. Built-in paper guide delivers quick and accurate paper positioning. Features large-capacity, easy-to-empty chip tray. Solid heavy-gauge steel construction. Non-skid base. Handle locks down. Sheet Capacity: 40; Operating Method: Manual; Number of Holes: 3; Hole Diameter: 9/32 in.