Carbide Bur Set Cut Type Single Head Shape Ball Cone Cylinder Oval Round Nose Tree Tree Head Diameter - Maximum 1/4 in Head Diameter - Minimum 1/4 in Number of Pieces 8 Primary Material Application Brass Bronze Cast Iron Zinc Trade Number SA-1 SC-1 SD-1 SE-1 SF-1 SG-1 SL-1 SM-2 End Type Flat Pointed Radius System of Measurement Inch Head Dia 1/4 in Coating Bright (Uncoated) Head Material Carbide Includes Plain Case Operating Speed - Maximum 70 000 RPM