Size: Hardware length 20mm Shitan (Rosewood) part: 3 layers (40mm) Togari-bou Large (50mm) bit Hardware diameter: Approximately 3mm Quantity: Set of 2 Edge burnishing leathercraft ebony scrap edge burnishing tip tool Leather craft tool leather burnishing Length 38MM Set of 2. When using, if the rotation speed is too fast or too much force is applied, the leather may scorch depending on the type. It is recommended to use with an inverter-controlled or 20-30w hobby rotary tool.