1.Part No.3064R3210D 2.Bit Diameter: 64mm 3.Button bits: 10 buttons 4.Button bit design: drop center, normal body. 5.Tungsten carbide (Buttons): Spherical, ballistic and conical. 6.Applications: Drifting, tunneling, bench 7.We have different designs for various rock formations, and a longer service life to decrease use costs for users. Negotiable Price.