Hello, this is Ashary from Changhong Drill in China. We manufacture high, medium and low air-pressure DTH hammers and drill bits, concentric and eccentric drilling system, tunnel TBM cutter, various threaded drill bits and shank adapter, coupling sleeve, drill pipe and rock drilling accessories.
ashary.you at g mail dot com
whatsapp:+86-13873343601
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OEM production as per you demand Type:Low air pressure,Medium air pressure,High air pressure Connect thread:API 2 3/8"REG,API 3 1/2"REG,API 4 1/2"REG,API 6 5/8" REG Connect with DTH bit:Same shank,DHD 340/350/360/380,QL 40/50/60/80