Additional Drilling Equipment - This is a new (never been used) DTH / Hammer Bit, type SD5 Mission shank, manufactured by SANDVIK Corporation, a Swedish firm. This drill bit size is 5 1/8", (the information shown in a spline is 42-51L9-130B55) serial number C67004. It has a convex face type. The Tungsten Carbide inserts on the head are a high quality ballistic style type, there are 9 on gauge with a total of 18 on the face. There are three air holes/blow holes on the head and 8 splines on the shank. The weight of this bit is approximately 31 pounds with the blow tube in place. Location: Fort Hill, Pennsylvania. For complete listing information please select the Click To Bid button to see this item on eBay.