pMARXMAN Carbide Burr, General Purpose, Series 597, Plain, 34 in Head Dia, 12 in Length of Cut, CylindricalNo End Cut Shape SA Head Shape, Double Cut Type, 14 in Shank Dia, Solid Carbide Head, Bright Head Coating, 19000 rpm Maximum, Applicable Materials Brass, Cast Iron and Copper, SA15 Industry Specificationp.