Size: Hardware length 20mm Shitan (rosewood) part 3 layers (40mm) Pointed rod large (50mm) bit Hardware diameter approx. 3mm Quantity: 2-piece set Edge burnishing leathercraft ebony scrap edge burnishing tip tool Leather craft tool leather polishing Length 38MM 2-piece set. When using, if the rotation speed is too fast or too much force is applied, the leather may burn depending on the type. It is recommended to use with an inverter-controlled or 20-30w hobby rotary tool.