Woodworking Special-Shaped Rotary File Small Tooth File $ 0.99 Product information: Shape: cylindrical grinding head Material: HSS Granularity: Dense (mesh) Outer diameter: 3 (mm) Shank diameter: 3.175 (mm) Length: 38 (mm) Scope of application: all kinds of stone carving and jade carving, grinding, polishing, polishing Specification: 6-piece high-speed steel small dental drill Material: high speed steel