Whiteside Left Hand Spiral Upcut Bit, 5/16 in. SH x 5/16 in. CD x 1 in. CL is a high-quality router bit designed for precision and efficiency. This bit features an up-cutting action that effectively pulls chips up and out of mortises, slots, and holes, making it i for deep cutting applications where excellent chip is essential. Its spiral shape ensures a smooth shearing action, delivering clean and smooth cuts regardless of the grain direction. Made from solid carbide and double fluted for durability and long-lasting performance, this bit is specifically engineered for use in left hand (reverse rotation) routers only. Manufactured by Whiteside Machine Company in Claremont, North Carolina, it combines expert craftsmanship with reliable functionality to meet the demands of professional woodworking. Model Number: LU3100