1,dental drill bist 2,drill bit set 3,ground drill 4, ... )Application: Applied in aerospace, cars, horologe, cellphone, electron and medical apparatus and instruments. MaterialSolid carbide steel(tungsten)CoatingTiAlN/AlTiNTypeDrill bitPrecisionHigh precisionOverall36 ... shipping options as possible,including UPS,DHL,Fedex and EMS. Dental drill bits