Kelly Bar, DTH Hammer, Foundation Construction manufacturer / supplier in China, offering The Digger/Torque Motors Square or Hex Shape Drive Shaft to Install Anchors or Piles, Low Headroom Friction Kelly Bar for Sale. Assembled by Tysim Max. Drilling Depth 37 M (Lock), Customized Extention Kelly Bar Drive Adaptor/Kelly Guide/Locking Plate/ Swivel / Customized Small Size Kelly Bar Drive Stub Spare Tool Used in Deep Foundation and so on.