Hebei ZhanKui Brill Equipment Co.Ltd specializers for water well,oir,field,construction,geothermal,directional boring and underground foundation work all over the world.Our purpose is to sell the best quality products at the lowest possible price.We are a professional supplier of new and used(rebuilt)drill bits used for oil filed,waterwell.By the way,we import  the scraped drill bits,tricone bits,if you have the products,pls do not hesitate to contact me.