We have different connector of drill bits such as M14, M12 and G1/2. We can supply the goods according to your specification. We can supply top quality core bits for processing vanity tops, countertops made of marble and granite. We have different connector of drill bits such as M8, M12, M14, 5/8"-11 and G1/2.Due to our strong R&D ability and skilled professional team and good management we can ...