Industrial Solid Carbide CNC 2D and 3D Carving Tapered Ball Nose and Flat Bottom, Zirconium Nitride (ZrN) Coated Up-Cut Router Bits designed for CNC 3D profiling and carving with machines such as "i-Carver", CNC Shark, ShopBot & CarveWright. Amana Tool 46590 Extra Long CNC 2D and 3D Carving Flat Bottom x 0.10 Deg x 1/4 D x 1/2 CH x 1/4 SHK x 4 Inch Long x 3 Flute Solid Sub Micrograin Carbide ZrN Coated Reduced SHK Router Bit allows you to achieve precision, depth, unparalleled accuracy, detail and clarity in foam and other modern-day materials. Excellent for: Acrylonitrile-Butadiene-Styrene (ABS), Acrylic, Acrylic Stone, Aluminum, Brass, Bronze, Composite, Copper, Corian, Coroplast, Dibond, Ethafoam, Ethylene-vinyl Acetate Foam (EVA), Expanded Polystyrene Foam (EPS), Expanded Polypropylene (EPP), Extruded Polystyrene Foam (XPS), Fiberglass, Fiberglass PCB Board, Foam Board, Graphite, HDPE, HDU, Lexan, 20lbs High Density Urethane, MDF/HDF, PALFOAM, Polyethylene (PE) Foam, Phenolics, Plastics, Phenolic Composites, Poly (methyl methacrylate) (PMMA), Polyethylene (PE) Foam, Polylam, Polyurethane Foam, PVC, PVC Foam Board, Sign Board, Sign Foam, Titanium, Tooling Board, Wood, XPE (Crosslinked Polyethylene) Foam. SPECIFICATIONS: (D) Diameter: 1/4; (a) Angle: 0.10; (B) Cutting Height: 1/2; (d) Shank: 1/4; Overall Length (L): 4; L1: 1-1/4; Type: Extra-Long Flat Bottom, ZrN; Flutes: 3; d1: 15/64.