This Michihamono leathercraft corner cutter is an ideal tool for rounding the corners of your leather. It features a superb 9mm wide cutting edge made of Blue Steel (Aogami no. 2) that has been expertly forged, and sharpened, guaranteeing that it is razor sharp right out of the package. This professional tool is handcrafted in Japan by skilled artisans and is of outstanding quality, and will last for many years. This corner cutter has a generous handle constructed of Japanese zelkova wood, which is strong and durable, as well as comfortable to grasp and apply pressure and control.This leather tool is sharp and no mallet is required when using, simply press with your hands and the corners will be sliced off quickly and smoothly. Available in different blade sizes (each sold individually) for removing leather corners in various sizes depending on your needs.Approximate Dimensions & Product Data:• Blade Material: Blue Steel (Aogami No. 2)• Blade Length: 50mm• Blade Width: 9mm• Handle Material: Japanese Zelkova• Handle Length: 110mmAvailable Sizes (each sold separately):• 4.5mm (3R)• 9mm (5R)• 12mm (10R)• 25mm (15R)• 40mm (25R)The "R" in the size indicates the radius (mm) of the round cutting edge.This listing is for the 9mm (5R) punching tool only. The leather materials and other tools shown are for illustrative purposes only.Please Note: The cutting edge of this tool is sharp, keep away from the reach of children.