Parts shop max fender roller. These are $240 new.
http://www.partsshopmax.com/page.php?10
Mine has a couple issues. The mounting plate accidentally got bent due to incorrect use on a 4 lug car. It was bent back and doesnt negatively effect use. I am missing the conical washers, and the bar that turns the screw (the bar/washers are removable and got removed to somewhere that I can no longer find). Can just get a $3 bar of the right size or use a long screwdriver. Price reflects the issues. $120