This leather roughening file is made of stainless steel and features a sun texture, non-slip handle, and wear-resistant design. It is available in 3/4/5/10mm sizes and is suitable for leather hair, bonding, and other leather crafting applications. The curved design provides a comfortable fit and easy application. Please note that due to manual measurement, there may be an error of ±1.5mm, and the actual color may differ from the product image due to lighting and camera effects.