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 46102-K SC Spektra Extreme Tool Life Coated Spiral Plunge 1/4 Dia x 3/4 CH x 1/4 SHK 2-1/2 Inch Long Up-Cut Router Bit combines a shearing action in cutting with an augering action in chip clearance. The shearing action yields an especially clean accurate cut while the augering action clears chips from the cut. Excellent for: Laminate, Melamine, Melamine Particle Board, MDF, Veneered Plywood, Wood. SPECIFICATIONS: Direction: Up-Cut; (D) Diameter: 1/4; (B) Cutting Height: 3/4; (d) Shank: 1/4; Overall Length (L): 2-1/2; Flutes: 2.