Leather hole punch set is easy to use. Simply unlock the handle, then rotate to select the desired hole punch size on the dial feel the click. Finally, just give it a form squeeze to punch at your desired Rotary Puncher Kit is made of plated steel, which is high hardness, which punches cleanly with less burr and stays for a longer time. The of the metal is treated with paint process to avoid oxidation. The belt hole puncher for leather machine features a 6-stage rotation design, with punching diameters of 3.5mm, 4mm, 4.5mm, 6X4mm, 7.2X3mm, and 6X4.5mm. It can be used on fabric such as canvas or denim, plastic sheets, rubber, and cardboard. its great for belts, watch bands, straps, dog collars, saddles, shoes, fabric, DIY home or craft projects, and more. The professional leather puncher features a compound leverage design, powerful and does not require much strength to get perfect holes. The handles are padded, non-slip and ergonomic. If your cutting object has elastic force, please put a piece of paper between the object and the brass sheet to prevent uneven force application that may result in imperfect holes. In the bottom of the punch pliers, there is a stainless steel buckle. When you're not working, you can close the safe lock. And the punch plier becomes small to save your space.