I think what Tim is saying is, core/demo a hole in the garage floor a few inches from the back wall, about 6"-8" diameter, then with a post hole digger, go down 2'-3', drop in the 4" round pipe (1/4"-5/16" thick) and fill around AND inside the pipe with concrete. Close enough to the wall to be out of the way, strong enough to pull just about any rolling vehicle, and doubles as a parking stop in case the brakes don't work. You can even do as Big Daddy said and add a plate or fixture for a bench type mounted power tool.