Heavy-duty, three-hole paper punch is fast, easy to use. The patented Carl punching system allows it to punch through more material than other punches. Punch through 72 sheets of paper at once. Hole punch is preset to punch three-hole pattern for three-ring binders. Built-in, paper guide ensures perfect positioning. Oversized handle allows easy open-handed punching. Solid metal construction includes hardened, precision-ground punch heads & an easy-to-remove, waste catcher with a large capacity. The punch heads & drilling disk are removable & can be quickly replaced.