1. dth bit with DHD, COP, MISSION shank 2. dth bit with QL, SD, XL,and MACH shank 3. button and bit face is on your request All of our down the hole drill bit is made of 100% vergin raw material with good quality. That makes the drilling performance is amazing. Besides, various shanks for your better choice. Specifications:1) shank: CIR, DHD, COP, MISSION, QL, SD, XL,and MACH2) bit diameter: from ...