CNC Solid Carbide Spektra Extreme Tool Life Coated Bits are made by Amana Tool, the leading manufacturers of high-quality wood-cutting tools. Amana Tool 46170-K CNC SC Spektra Extreme Tool Life Coated Compression Spiral 1/4 D x 7/8 CH x 1/4 SHK x 2-1/2 Inch Long 2 Flute Router Bit features a nACo nanocomposite coating with an extreme nanohardness and heat resistance. With a brilliant, distinctively-tinted coloring, nACo provides additional improvements in four critical aspects of router tooling. Excellent for: Carbon-Fiber-Reinforced Polymer - Plastic Materials (CFRP), Double Sided Melamine, Laminate, Laminated Plywood, Melamine Particle Board, MDF, Oriented Strand Board (OSB), Particle Board, Softwood/Hardwood, Veneered Plywood. SPECIFICATIONS: (D) Diameter: 1/4; (B) Cutting Height: 7/8; (d) Shank: 1/4; Overall Length (L): 2-1/2; B1: 7mm; Type: nACo Ceramic Coating; Flutes: 2.