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The Onsrud 57-300 Spiral Router Bit is designed for professional and hobbyists alike who require precision cutting in natural wood, solid surfaces, and wood composites. Featuring a downcut spiral design with a 1.125 cut length, this solid carbide bit provides superior performance in various applications such as cabinetry, furniture making, architectural millwork, and woodworking. With a cutting diameter of 0.3125 and a shank diameter of 5/16, the bit delivers unmatched precision and stability while cutting through tough materials. Equipped with a piloted design that ensures perfect centering on a router table, the Onsrud 57-300 Spiral Router Bit is ideal for all your woodworking needs.