【50 Sheets Hole Puncher】: Our heavy duty hole punch is engineered to handle up to 50 sheets of 21lb (80gsm) copy paper, making it ideal for large projects, office use, and more. 【50% Effort Reduced 3 Hole Punch】: The 3 hole puncher for binder, utilizing the principle of leverage, our innovative design ensures that the effort arm is significantly longer than the load arm. This translates into effortless punching, saving you 50% of the force required compared to non-ergonomic models. 【Three adjustable punching heads】: This hole punch features three interchangeable punching heads, offering versatile functionality. By adjusting the position of each head, you can easily switch between a standard three-hole punch configuration and a two-hole punch configuration. 【Heavy-duty Metal Paper Hole Puncher】: Crafted from premium metal materials, our 3-ring hole punch is built to last. Measuring 10.6(L)x8.9(W)x7.2(H) inches and weighing in at 4.79 pounds, it boasts a robust construction that guarantees years of reliable punching, even under heavy use. It is unquestionably a heavy-duty hole puncher designed for long-term service. 【Integrated Metal Paper Guide】: Included with the 3-hole punch is a metal paper guide with clearly marked measurements. The paper guide allows precise alignment of multiple sheets of various sizes. When not in use, simply secure it with the two steel buckles for storage. This is a metal heavy duty 3 Hole Punch, 50-Sheet capacity, 50% reduced effort, removable punch heads make it a 2 hole punch as well, it has a large chip tray, metal paper guide, and is made of high quality metal for long lasting use. It punches 3 standard holes, or two holes when using the removable punch heads. The large chip tray catches all of the paper waste.