ahdai

Diamond core drill bit 1.Fast drilling 2.No Breakage of Segments 3.many designs and sizes 4.Sharp & long lifespan Diamond core drill bitFor dry and wet coring in reinforced concrete with very hard aggregate. Also good for granite, marble, tile, glazed brick and other hard base materials with low abrasiveness.Advantage: Drilling stably, fast speed, not breaking the border and long life. Diameter ( ...