Rotary bitProduct Description1.Apply to continuous ... strenghtening wear resistant pick head.Company InformationShandong Yikuang Drilling Technology Co.,Ltd. (hereinafter referred as YK ... -hole drill rigs; the hydraulic drilling tools include drill rods, drill bits, couplings, shank adaptors, hydraulic ... and thereof spare parts. DTH drilling tools include DTH hammers, DTH bits and DTH drill pipes of high ...