1,micro drill bits 2,drill bits 3,ground drill 4,micro carbide quick bits 5,tungsten carbide drill bits Our Facility: 6 ANCA grinding ... also manufacture spherical drilling tool.drill,drilling rig,drill bit,power drill9,Material:Solid carbide steel(tungsten steel)Application: Applied in ... as possible,including UPS,DHL,Fedex and EMS. Micro drill bits