Heavy Duty Car Ramps, You Could Drive A Bus Up On These, that is how they were advertised to me, and I believe it, these ramps are heavy, 2 piece, 1 piece slides inside the other for storage, pull it out, and drive on up, there are 2 pairs, of these ramps, see photos, Again, these ramps are heavy, but if you are looking for the ultimate in protection when working under your car or bus, these are the way to go, thanks for your interest, and if on Craigs, they are still available.