Made of heat-treated Solid YG8 that hardness can reach to HRC70, hardness, high strength, and durability. WIDELY USE Ideal for ferrous and non-ferrous metals, wood, plastic and even stone cleaning, trimming, carving, cutting, shaping, grinding, welding, chamfering, casting, deburring, polishing and removing edges, ewelry making , cylinder head porting and sculpting. COMPATIBLE Universal 1/4 Inch Shank - compatible for most rotary tools and die grinders. easy to grasp and use, safe and reliable. DOUBLE CUT Double-cut style has rows of cutting teeth cut in two intersecting directions for fast material removal and a rougher finish. MUST HAVE 10pcs die grinder bits suitable for all skill levels | this is a essential kit for various DIY arts , crafts hobbies, metalworker & woodworking enthusiasts . Packed with a case for safety storage and protection, also is best choose for gift., Weight: 0.15322127209 pounds, Manufacturer: Htuteyy