Grounder and Rounders;

3/4'' diameter socket opening Item Dimensions 1 x 6.85 x 1 inches American made Ground rod driver with a deep socket and works with all rotohammers that have the SDS+ shank. Measures 6 3/4'' long with an outside diameter on the socket of 1''. The shank is the SDS+ (also known as SDS) and that measures approximately 3/8'' diameter. Used with rods which are 3/4'' in diameter. One piece machined construction with a long socket. Measures 5 7/8'' long with an outside diameter on the socket of 1''. The shank is the SDS+ (also known as SDS) and that measures approximately 3/8'' diameter.