Zhengzhou Rui Yi people adhering to the Central Plains drill bold and solid, invited experts, and leadership to our company, guidance, enlighten and look forward to working with you in good faith, "the pursuit of excellence" will always be our theme, we will make every effort, create greater efficiency, and strive to advanced technology, excellent product quality, coal mining enterprises to provide multi-faceted services. Large supply of various types of PDC drill bits, the best product quality assurance, best price. Model: 28 # 30 # 32 # 40 # 42 # and so on. I believe this product is definitely your best choice! PDC half tablet / wafer anchor drill Uses: mainly used drilling coal bolting with mesh holes for fast and efficient roadway excavation provides a strong guarantee. Features: ● substantial increase in hard rock (sandstone) drilling speed and drilling efficiency ● blade with good wear resistance, fight strong, without repeated grinding, long bit life. ● easy necking, into the hole rate, greatly reducing the drug volume, waste anchor, improve construction efficiency, reduce labor intensity, suitable for a wide range of lithologies. ● drill bit using the new PDC superhard materials, bits long life to adapt to rock: soft to medium-hard full and broken ground QQ: 210766155 official website: http: //www.zuantou.cc http: //www.chinazzjx .cn Contact: Li-mail: 210766155@qq.com