Are you looking for the pass through socket, where the stud can go right through the back side of the socket? If so, snappy is not the only one who makes them. IIRC, K-D, Titan, and one or two others make them as well. I have had both the snappy braned and the K-D, with little to no difference in tool quality, but a vast difference in price.
Here is the link for the K-D tool.