Solid Carbide Industrial quality aluminum cutting router bits are made by Amana Tool, the leading manufacturers of high quality wood cutting tools. Amana Tool 51486 SC Spiral 'O' Single Flute, Aluminum Cutting 1/8 D x 3/4 CH x 1/4 SHK x 2-1/2 Inch Long Up-Cut Router Bit with Mirror Finish uses the highest quality sub-micrograin carbide, has a special proprietary edge processing system and features a super high polished cutting edge with a unique mirror finish, resulting in clean cuts, less chance for chip re-welding, a superior surface finish and a longer tool life. The spiral O flute sharpening/finishing process increases feed rates, allowing for more linear feet routed in less time. Excellent for: ALPOLIC Copper Composite Material (CCM), Alucobond, Aluminum, Aluminum 6061, Aluminum Alloys (Al-Alloy), Aluminum Composite Materials (ACM), Aluminum Composite Panel (ACP), Alupanel, Brass, Copper, Dibond, Durabond, e-panel, Etalbond, Gold, Non-Ferrous Metals, Plastic, Silver, Solid Surface, Titanium Composite Material (TCM), Wood. SPECIFICATIONS: Direction: Up-Cut; (D) Diameter: 1/8; (B) Cutting Height: 3/4; (d) Shank: 1/4; Overall Length (L): 2-1/2; Flutes: 1.