Carbide Bur Set Cut Type Double Head Shape Ball Cone Cylinder Tree Head Diameter - Maximum 1/4 in Head Diameter - Minimum 1/4 in Number of Pieces 5 Primary Material Application Brass Bronze Copper Nickel Steel Titanium Zinc Trade Number SA-51 SC-51 SD-51 SF-51 SM-51 End Type Flat Pointed Radius System of Measurement Inch Head Dia 1/4 in Coating Bright (Uncoated) Compatible Tool Type Die Grinder Rotary Power Tool Straight Grinder Head Length 7/32 in 1/2 in