Hex - shank diamond drill bits are our topbest products that we guarantee superior quality and performance in the industry. For professionals, these drill bits serve well in applications that cut through difficult materials such as granite and porcelain. The hex shank feature ensures a snug fit on to the drill thus giving more control over the torque and the drill itself. We have more than twenty years in diamond tool making business and within that period, we have made sure that we offer products that are of global quality and serve the varied demand of our international customers.