RUHIWORKER FOR INDUSTRIAL USE ONLY 1/4" 1/8" 1/16" inch Cutting Diameter Tapered Ball Nose Spiral Router Bits NaCo Coated Up Cut Solid Carbide CNC Router Bits 2D and 3D Carving with 1/4 Inch Shank Industrial Solid Carbide CNC 2D and 3D Carving Tapered Ball Nose. NaCo Coated Router Bit allows you to achieve precision, depth, unparalleled accuracy, detail and clarity in foam and other modern-day materials. This NaCo coated end mill has 1-1/2" cutting length. The overall length is 3" with a 1/4" shank. With the added coating, the bit's lifespan and durability are increased substantially avoiding unnecessary down time. These bits pull the wood chips up and away from the tool path which helps prevent tool breakage and extends the life of the bit.