I made my own using an old deep wall socket w/ a GM style lug nut welded to the end of the socket so you can still fit a screw driver into the socket. And all you need is a 19mm wrench for the lug nut. I know on the D-series heads you can get away w/ using just a wrench but the B-series heads are a pain in the butt to adjust w/ just trying to use a wrench. I know if you bought one from the tool truck they go for around $100. Its an expensive tool, thats why I made my own.