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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 #46260-K SC Spektra Extreme Tool Life Coated Carbon Fiber Cutting Down-Cut 1/8 D x 1/2 CH x 1/8 SHK x 2 Inch Long Router Bit designed to produce a minimum failure in composite materials such as layers separating and a significant loss of mechanical toughness. Excellent for: Carbon Fiber, Carbon Fiber Reinforced Polymer (CFRP), Carbon Graphite, Composite Materials, Fiber Glass, Fiberglass PCB Board, Fiber Reinforced Plastic (FRP), Glass Fiber Reinforced Polymer - Plastic Materials (GFR), Glass Reinforced Plastic (GRP), G10 = High-pressure fiberglass laminate, a kind of composite material, G10 / FR-4 Glass Epoxy Composite Laminate Material, G11 / FR-5 Glass Epoxy Composite Laminate Material, Phenolic, Phenolic "Garolite" G-7, Plastic PVC & Acrylic. SPECIFICATIONS: (D) Diameter: 1/8; (B) Cutting Height: 1/2; (d) Shank: 1/8; Overall Length (L): 2; Flutes: 10.