Dremel's line of Max Life high-performance accessories provides long-lasting performance and impressive durability. Built to give you longer lasting, stronger performing, versatile accessories. The Max Life 9901HP Tungsten Carbide Carving Bit is coated in titanium nitride and is engineered to last 2X longer than the standard, non-coated Dremel 9901 bit. For use with all Dremel high-speed rotary tools, the 1/8 In. (3.2 mm) accessory can be used for more aggressive applications to shape, smooth, or grind hard materials such as metals, hardened steel, fire ceramics, cast iron, plastics, and hardwoods.