High-performance electric punch with fixed punch heads is fast and reliable. Ideal for high-volume projects and use in shared work spaces. Ergonomic push-button activator allows effortless punching with quick, precise and crisp cuts. Electric punch drills two 1/4" holes through 28 sheets of paper at one time. Anti-jam knob provides worry-free operation. Built-in paper guide lets you align paper easily and neatly. Smooth, quiet operation enhances environment. Heads are not adjustable.