Cylinder Bur SB End Type Flat Cut Type Double Shank Dia 1/4 in Head Dia 3/8 in Head Length 3/4 in Included Angle Not Applicable Overall Length 2 1/2 in Trade Number SB-3 Primary Material Application Brass Bronze Carbon Steel Cast Iron Stainless Steel Titanium Head Shape Cylinder Operating Speed - Maximum 66 000 RPM Coating Bright (Uncoated) Head Material Carbide Shank Material Steel