Description Suitable choice of raw material, advanced processing technology and perfect quality warranty. With hardened treatment, drilling life can be extended and then cost can be reduced. Size range 4.5,5,5... Read More
QL80 DTH hammer bits with tail pipe Description 1. has higher drilling speed. 2. can provide hardening treatment in order to prolong the service life and reduce the cost of use. 3. single impact power is large, ... Read More