... is on your request All of our down the hole drill bit is made of 100% vergin raw material with good quality ... ) shank: CIR, DHD, COP, MISSION, QL, SD, XL,and MACH2) bit diameter: from 76mm to 305mm is all available3) air pressure ... pressure are both available4) bit face design:5) button shape design:If you are interested in our dth drill bit, just contact us ...