HARFINGTON 5-Piece Carbide Rotary Burr Set - 1/8" (3mm) Shank, 1/4" (6mm) Head, Double Cut, 60 Degree Cone M-Shape - Professional Die Grinder Bits for Metal, Wood, Plastic Polishing & Engraving - Perfect for DIY Projects, Metalworking, Wood Carving & Crafting