We are the manufacturer of most complete models of dth hammer and bits in China. It includes: 1) 3.5" hammer, shank : dhd3.5 2) 4" hammer, ir dhd340a / sd4 / cop44 / ql40 shank 3) 5" hammer, ir dhd350r / sd5 / cop54 shank 4) 6" hammer, ir dhd360r / sd6 / cop64 / ql60 shank 5) 8" hammer, ir dhd380 / sd8 / cop84 /ql80 shank 6)10" & 12" hammer, sd10/sd12 shank, Numa120, Numa125 7) above: 15", 18" dth hammer and bits
Contact: Yong Zhe