These do indeed fit the Jerry Cans very well.  I was disappointed to find out that they bolt holes on the carrier do not match the bumperette holes on the back of my 1991 Wrangler.  I have to make an adapter unit to get these to fit.  Also, if they had gone where the bumperettes had been, they would put the Jerry Can too high and it would not fit due to the taillights.  A very nice product, but hardly mount and go ready.