Carbide Bur End Type Radius Cut Type Single Shank Dia 1/4 in Head Dia 1/2 in Head Length 7/16 in Included Angle Not Applicable Overall Length 2 3/16 in Trade Number SD-5 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Steel Titanium Head Shape Ball Operating Speed - Maximum 50 000 RPM List Number 310D System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel