Here at Bostitch®, we're confident this 3-hole punch will impress. With its easy-to-squeeze design that requires a whopping 50% less effort, it also boasts an adjustable paper guide and integrated ruler for quick, precise measurements and hole placement. Don't sweat about jamming this unit  the No-Jam™ technology avoids these issues and ensures smooth operation. Sheet Capacity: 12; Operating Method: Manual; Number of Holes: 3; Hole Diameter: 9/32".