... and tool accessories such as face milling cutter, carbide twist/ center drill bits, carbide inserts(milling/turning), milling cutters, turning tool ... , collets, pull studs, boring cutters etc. 1.Tungsten carbide drill bits--our HOT products, we have different coatings for different ... time is short. Any request on the tungsten carbide center drill bits 60 degree, please send me your inquiry details ...