Hebei zhankui drilling equipment co.,ltd (www.rockbits-dragbits.com/ ) is the brother company of Cangzhou Great Drill Co.,l.td (www.pdcbit.net/) , mainly supply PDC bits, tricone bits, drag bits, hole openers. We can also supply safety clamps, DTH hammer bits, casing centralizer, hammer union and some other drill equipments with better prices.
Just let me know if you have any questions.
Thanks