The OEM Swingline High-performance Electric Punch SWI74535 is designed for fast and reliable use in high-volume projects and shared workspaces. It features fixed punch heads and an ergonomic, push-button activator for effortless punching, allowing you to drill three 9/32" holes through 28 sheets of paper at once. The anti-jam knob ensures worry-free operation, while the built-in paper guide helps align paper neatly. Its smooth and quiet operation enhances the working environment.