Die Grinder Carbide Bur Kit, Head Shape Cylinder, Head Diameter - Maximum 3/4 in, Head Diameter - Minimum 3/8 in, End Type Radius, System of Measurement Inch, Head Dia. 3/8 in, 3/4 in, Includes 1/2 in Ball, 1/2 in x 1 in Cylinder with Radius End, 1/2 in x 1 in Tree Shape with Radius End, 1/2 in x 1-1/8 in Taper with Radius End, 1/2 in x 7/8, 3/8 in x 3/4 in Cylinder with End , 3/8 in x 3/4 in Tree Shape with Pointed End, 3/8 in x 5/8 in Oval WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)