â—Features: ※ Stay Sharp. ※ Smooth cut & no chatter. ※ Use for home and industrial. ※ Effectively pull the wood chips out. ※ Suitable for low hardness of the workpiece, such as wood. ※ Titanium Coated Countersink Deburring Bit Metal Wood Drill. ※ Chamfer Countersink Deburring Drill Bit Crosshole Cutting Metal Tool. ※ High speed steel, high hardness, sharp knife, excellent cutting performance. ※ Used for workpiece circular aperture chamfering or cone hole, the edges on the surface of the chamfering processing.