Description: 20 different bit, Each Burr is shaped to fit different angles or situations, fits Tool, meet most of your drilling needs 3.1mm shank diameter and compatible with other multi-tool machines. Purpose: stone carving, jade carving, grinding, polishing Can work with most small rotary tools for DIY carving fans High speed steel feature as solid, can last for longtime, not easy to get wearing. Specification: Material: HSS Color: Silver Total Length: Approx. 40mm/ 1.57inch Shank Diameter: Approx. 3.1mm/ 0.12inch Package Includes: 20 Pieces HSS Rotary Bit Burr Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test
