1、EFFICIENT AND FLEXIBLE: Fine grinding grooves, efficient and flexible, direct chipping with smooth chip removal. Beautiful and exquisite, effective, labor saving, and possess fast drilling speed 2、UNIVERSAL SHANK TYPE: Come with glossy surface, widely used, universal shank type, and high grinding accuracy 3、ACCURATE QUENCHING: One time forming as a whole, come with stable size, accurate quenching, durable for a long service life 4、USED FOR METAL MATERIALS: Suitable for stainless steel, carbon steel, cast iron, die steel, alloy steel, tool steel, non ferrous metal materials 5、CEMENTED CARBIDE MATERIAL: The product is made of cemented carbide, the blade diameter is 13mm, and the number of teeth is 4