1.PDC anchor bits for conglomerate,granite,limestone 2.High abrasion resistance ,high impact resistance,high drilling efficienc PDC ... tungsten carbide bits. Usually the anchor shank drill bits have 2 or 3 wings.LD adopt high quality cutters and advanced ... CodeDiameter(mm)WingThreadMG-H-225-28,322M14*1.5, M16*2 MG-W-225-28,322MG-H-3283MG-Y-2422Note: We also ...