Coupling sleeves, also named Coupling, lead the connection between drill rod and shank adapter, thereby make the drilling tools be a overall that transfer the energy.
Material: alloy steel bar
Type: full-bridge,semi-bridge,same diameter etc
Thread type:R22,R25,R28,R32,R38,T38,T45,T51
Length:140mm-250mm
Other specifications we will make as your request.
couplings
couplings sleeve
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