Advantage: Densely grooved to help your leather roughen up faster and be fully prepared for your glue application. Just the right depth, only works on the surface of your leather, is suitable for various thicknesses of leather, and will not damage your leather. If the file is too deep, it may wear through the leather. The non-slip handle and the special design of the points on the surface prevent the handle from falling out of your hand, helping you to work on leather more easily and save effort. Material: High-quality steel, lightweight, hard, and durable， can be used for a long time without feeling tired. Plastic handle for a comfortable grip, stable plastic that wont crack. Size: 3mm/4mm/5mm/10mm Four different sizes for your choice. Notice! The tip of this leather tool is sharp, please be careful when using it!