Type: button bits, chisel bits, cross bits Model Number: X,XX,EX,EXX,EC,ECC,ESF, ... Quality Drill Bits1)Business Type: Manufacture and sale2)Min. Order: 2000 pieces3)Type:X,XX,EX,EXX,EC, ... We can offer a large range of drill bits to suite the changing geology encountered durig project, ... distance from JYDR.JYDR contributes the engagement in R&D, manufacturing and international trade of precision steel ...