The pliers are treated with spray paint, anti-rust, and with forging and forming technology, the pliers are solid and durable. The clamp head is made of carbon steel. After two heat treatment processes, the hardness is higher. Product is equipped with up to 6 kinds of round holes of different sizes to meet your different needs! Features - - Material: High-carbon steel and PVC - Size: About 24x7.2cm - The round hole specifications: 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm - The pliers are treated with spray paint, anti-rust, and with forging and forming technology, the pliers are solid and durable - The clamp head is made of carbon steel. After two heat treatment processes, the hardness is higher - Product is equipped with up to 6 kinds of round holes of different sizes to meet your different needs! - The bottom of the drilling pliers is made of pure copper gasket, which has a texture and can protect the wear of the holes and tubes well - The handle is made of material, completely free from odor, anti-skid, wear-resistant and semi-concave finger groove design Usage 1. Tighten the rubber handle and push down the buckle (small iron sheet) 2. Release the handle and unfold 3. Rotate in the direction of the arrow to the desired size (it may be a little tight and requires some force adjustment) and aim at the copper sheet 4. Put the belt or the articles needing to be punched on the copper sheet (it is better to pad the cardboard to improve the punching effect). Package list: 1 x Belt Hole Punch Plier