Industrial Solid Carbide CNC 2D and 3D Carving Ball Nose. Spiral Router Bit allows you to achieve precision, depth, unparalleled accuracy, detail and clarity in foam and other modern-day materials. This ball nose end mill has a 1/2" cutting diameter x 1-1/4" cutting length. The overall length is 3" with a 1/2" shank. 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.