Detailed Product Description Drill bit is a kind of diamond tool to drill round hole in the stone. In the large-scale factory, drill bit is jointed with special machine tool through screw thread and cuts stone revolving under the pressure. In the operation, water is infused into the water channel and outflow from the gap of bit's outer circle for cooling and discharging stone powder. The high capability of water-though can prolong bit's life-span and keep the sharpness of bit.
