Premium Material, Made of High Quality Tungsten Steel. Suitable for use on wood, iron, steel, carbon steel, alloy steel, stainless steel, copper, aluminum, and other metals, as well as marble, jade, and bones. All cutters feature a 1/8 inch shank, compatible with most rotary tools and die grinders. Highly recommended for DIY, crafts, hobbies, home repairs, jewelry making, lapidary work, modeling, and more. Includes 10 different countersink tools: ball, cone, cylinder, needle point, conical point, and others, to meet a wide range of drilling, engraving, carving, polishing, beveling, chamfering, grooving, reaming, and hollowing needs. Designed for use with rotary tools operating at speeds of 6000-50000 rpm, ensuring efficient performance, durability, and safe operation. Carbide Burrs (Rotary Files) are made from high quality tungsten carbide steel for strength and long-lasting performance. Specially engineered for efficient cutting, with a 1/8-inch shank that fits most rotary tools. Ideal gift and essential tool for DIY enthusiasts and metalworkers. Always wear appropriate personal protective equipment, such as gloves and eye protection, when using rotary tools with carbide cutters. This carbide burr set is compatible with all handheld rotary tools and includes various burr heads in different shapes and sizes for precise and detailed work like engraving. Constructed from heat-treated tungsten carbide, offering exceptional hardness, toughness, durability, and resilience. More durable than standard cutting tools made from HSS steel, resin, or other abrasive wheels. Each carbide milling head features bi-directional cutting teeth arranged in intersecting rows to maximize cutting efficiency and material removal. Optimized tooth angle helps reduce chipping and extends tool life. Ideal for precision applications and versatile enough for a wide range of tasks, including metalworking, die sinking, surface cleaning, tool making, wood carving, jewelry making, deburring, sanding, grinding, cylinder head porting, carving, and chamfering on wood, metal, and stone. Excellent for cutting carbon steel, alloy steel, stainless steel, and hardened steel.