We are manufacture of all kinds of drill bits, our regular clients are BOSCH,STANLEY,WUERTH,SANDVIK,BLACK&DECKER,VONDER, and so on.we are powerful in such item,we are established in 1992,now we have workers more than 5500,worke area more than 10,000,000 square meter. export volume reaches to $ 55,000,000us dollar per year.our products have high quality,we have TUV CERTIFICATE,ISO 9001:2000 certificate.if you have inquiry of such item,plz feel free tocontact with me.i am here to servise you