Our main production of mining equipment and brazing with a chevron, cross, three-blade-shaped, X-shaped ball tooth drill bits, column toothed drill head, column gear easy to return to the drill head, the anchor bits, coal mining cut-off teeth, DTH Bits, tapered drill rods, the end of drill rod, drill pipe drill rod of all kinds, gas Gao Gao solder, drill rod, drill bits, solder tail, DTH drilling tools, rock drilling tools