Medium-Duty 3-Hole Punch is powerful, convenient, compact and chic. This extremely durable, yet affordable paper hole punch will punch up to 40 sheets of standard 20 lb. bond paper. The HC-340 has an oversized handle for easy open-handed paper punching and is pre-set to punch 9/32" diameter holes for standard 3-ring binders. The HC-340 features a handle that locks down for storage and safety, a large capacity waste tray, a non-skid base for added stability, a standard 3-hole punch pattern and . The HC-340 is sturdy and durable thanks to the solid heavy-gauge steel construction. Built-in paper guide ensures perfect positioning. the eye-pleasing color scheme complements any office décor. Limited Lifetime Warranty.