I also learned the hard way the difference in these jacks. Have a 90 Carat
with fiberglass molding and someone gave me a nice new looking jack to
replace my beat up old one. After having a flat on the road I quickly saw
the difference before the tire even got of the ground. I now have a 3 inch
gash in fiberglass and was very nervous during the tire change but had to
get it done. Find the right jack. You'll be glad you did. Merv