pMorse Carbide Burr, General Purpose Premium, Series 5970, Radius, 14 in Head Dia, 1 in Length of Cut, 2 in Overall Length, CylindricalRadius End Shape SC Head Shape, Standard Cut Type, 14 in Shank Dia, Solid Carbide Head, Bright Head Coating, 50000 rpm Maximum, Applicable Materials Cast Iron, Ferrous Metals and Steel, SC1L industry Specificationp.