About This 【Sharp Edge】After special process heat treatment, the hardness and toughness is stronger, very suitable for professional leather craft. 【High Quality Material】Made of high grade carbon steel, the surface is treated with black anti-rust treatment, strong anti-rust performance, wear-resistant, suitable for intensive stamping and long-term leather processing techniques. 【Easy to Use】Simply strike with a hammer to easily punch through the leather and get a smooth and clean curved leather. 【Usage】Superior quality, can punch thick material, perfect for making leather crafts such as belts, watch straps, wallets and backpacks. 【Multiple Sizes】Includes 5mm, 8mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm in 11 different sizes to meet your multiple use needs. Overview Material : Carbon Steel Color : 12 Brand : WUTA Item Weight : 0.58 Kilograms Operation Mode : Manual