I just received them. In the box were two sets of chains. As others said only one came, I ordered two, so it actually came as 4 sets. I expect Revane to take one back. The manufacturer and Revain must clearly state that it is a pair of chains, as other chain suppliers may do. I found a way to put the chains on without lifting the tractor (per the instructions). I tie the end of the chain to the back of the bar and move forward very slowly, constantly feeding the chain so it sits evenly on the bar. The snow and ice season is basically over so I probably won't be testing them until next year, but they seem very effective, but clearly not for pavement use.