PREMIUM CARBIDE CUTTER SET: This set includes 8 of the most popular shapes in a fitted case. With 1/4 inch shank, suitable for processing various metals and most rotary grinders. Excellent choice for precise metal removal when shaping, leveling or porting cast iron, steel and other ferrous metals. ADVANCES TUNSTEN MATERIAL: 100% virgin tungsten carbide burr rough whose life is very long, 10 times the durability of other HSS cutters and 200 times the durability of the small wheel. The hardness can reach HRC70, sharp and sturdy. PRECISE DOUBLE CUT: Double cut style, the right and left helical flutes combine to produce a chisel-like cutting tooth, this precision, when combined with precision grinders, results in smooth operation, fast metal removal and fine finishes. WIDELY APPLICATION: Widely used for metal working, tool making, engineering of model, wood carving, jewelry making, welding, chamfering, casting, deburring, grinding, cylinder head porting and carving. Include body shops, fabrication shops, brake shops, industrial shops, die makers. TJATSE BRAND GUARANTEE: Packed with an excellent carrying case for storage and protection in completely safe. TJATSE offers a one-year, no-questions-asked replacement warranty and friendly customer service. We aim to provide solutions for the industry through both our products and our professional services.