We are one of the largest enterprises in China manufacturing various Impregnated and Surface Set and electroplated Diamond Core Bits, Reaming Shells, Drilling Equipments and Accessories whose quality as well as functions have been proved by scrupulous tests, and our web sites (www.forsun-tools.com / www.corebits.cc) have clearly displayed the main items suppliable at present. All our products are manufactured as per standards of DCDMA, CDDA, Craelius or ISO.