This is Dremel"s 3/32" Tungsten Carbide Cutter Accessory Bit. FEATURES: A high-speed cutter made of tungsten carbide, the hardest material next to diamonds. Flat end (cylindrical shape). Ideal for shaping, smoothing or removing material from especially hard materials including hardened steel, stainless steel, cast iron, nonferrous metals, fired ceramics, plastics and hard woods. Use this bit at higher speeds for hard woods, slower speeds for metals, and very slow speeds for plastics. INCLUDES: One Tungsten Carbide Cutter REQUIRES: Rotary Tool SPECS: Cutter Diameter: 3/32" (3,4mm) Shank Diameter: 1/8" (3,2mm) COMMENTS: Do not use this cutter for drilling holes or for enlarging holes that are less than twice the diameter of the cutter. The tungsten carbide surface can easily catch the side of a hole and break the bit. kr11/15/01 ir/kh