Carbide Bur End Type Radius Cut Type Double Shank Dia 1/4 in Head Dia 1/4 in Head Length 7/32 in Included Angle Not Applicable Overall Length 6 7/32 in Trade Number SD-1L6 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Steel Titanium Head Shape Ball Shank Length 6 in Operating Speed - Maximum 65 000 RPM List Number 310D System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron