5pcs Tapered End Mills Set for Carving and Cleaning Edges Shank Diameter: 0.6cm, 2 Flutes, TiAlN Coated for Wear Resistance Ball Diameter: 0.25, 0.5, 0.75, 1.0mm, Flute Length: 15mm Bits for CNC Engraving Machine, Plywood, Hardwood, Acrylic, Carbon Steel, Inconel, etc Suitable Material: 55 HRC, Long Service Life, Reduce Cutter Changeover Time, Save Production Time