Three-hole paper punch is fast, easy to use & can punch through 150 sheets of 20 lb. paper at once. The patented Carl punching system allows it to punch through more material than other punches. Hole punch is preset to punch a three-hole pattern for three-ring binders. Ergonomically designed handle increases the punch head force & decreases fatigue when punching high volumes of materials. Built-in, paper guide ensures perfect positioning. Oversized handle allows easy open-handed punching. The punch heads & drilling disk are removable & can be quickly replaced. This heavy-duty punch also features solid metal construction with a sturdy molded plastic base & large-capacity catch tray. All plastic comes from recycled ABS.