CARL 63150 Model xhc-150 extra heavy-duty 150-sheet 3-hole punch, 9/32 holes, gray/blue CARL XHC-150 Extra Heavy-Duty 150-Sheet Capacity Three-Hole Punch. Hollow punch head technology requires less force. Built-in paper guide for quick paper positioning and punching. Preset to drill 9/32" diameter holes for standard 3-ring binders. Large, easy-to-empty waste trays. Preset to drill holes for standard three-ring binders Large, easy-to empty waste tray Built-in paper guide Hollow punch head technology requires less force Limited lifetime warranty - excluding punch heads and disks CARL XHC-150N Extra Heavy-Duty 150-Sheet Capacity Three-Hole Punch. Hollow punch head technology requires less force. Preset to drill 9/32&#034; diameter holes for standard 3-ring binders. Built-in paper guide for quick paper positioning and punching. Large, easy-to-empty waste trays. CARL 40-sheet capacity, HC-340 Heavy Duty 3 Hole Paper Punch. Three precision-ground all-steel 9/32&#034; punch heads. Strong steel handle grip for easy open-handed punching. Built-in paper guide for quick paper positioning. HANDLE locks down for storage and safety. Hardened precision-ground all-steel punch heads. High-strength &#039;samurai steel&#039; hollow-core punch head technology requires less force. Punch through 300 sheets of 20 lbs. paper at once. Adjustable margin depth selector and centering guides; large-capacity waste tray, Heavy-gauge steel. Punch heads available in 9/32-inch diameter and 11/32-inch diameter. Built-in paper guide for perfect positioning.