Product Description 20PCS/Set HSS Router Grinding Burr Wood Rotary Files Set Dremel Accessories New 100% Brand New and High Quality Feature: -Great addition to your Hobby Craft tool kit. -All with shaft diameter is approx 3mm -These 20 HSS Routing Bits are perfect for all sorts of jobs like Model making . -It is mainly used for engraving and milling of soft wood. Specification: Material:HSS Color:as picture shown shaft diameter:3mm Full length:approx 40mm Package includes: 20pcs/set Note: 1.Plea