China 8mm Shank DTH Drill Bits Grinding Pins - China ...
(2) Grinding Pin, Grinding Cup and Grinding Wheel BESTLINK supplies you 4 kinds of grinding cup for your various needs. The Diamond grinding cup is a perfect tool for grinding your broken button bits, to prolong its lifespan. We have different model: 8mm shank model, 9mm shank model, internal hex drive model and 55-drive model.
