1.Part No.3057R32F09R 2.Bit Diameter: 57mm 3.Button bits: 9 buttons 4.Button bit design: Flat face, retrac body. 5.Tungsten carbide (Buttons): Spherical, ballistic and conical. 6.We have different designs for various rock formations, and a longer service life to decrease use costs for users. 7.Negotiable Price