Spiral Upcut Router Bit 1/4 Inch Shank 1/8 Inch Cutting Dia. 1'' CL. Extra Long 2-1/2'' OVL. Carbide Upcut CNC Bits, Ideal for Wood Engraving Plunging Coating (5PCS) 1/4" SHK - 1" CL - 1/8"