When the chains arrived there was a label attached stating which tires this particular chain fits. My tire size was not listed. I called the company to make sure I ordered the right size; I had. They said the label only says a few sizes and they get a lot of complaints about it. I watched the video on the Revain page for this product, read the instructions carefully and the chain didn't fit my bar. I called the manufacturer, Peerless. I've been told that tire sizes are like shoe sizes: they're close, but not always accurate; my tire from my manufacturer must be large. No problem, he said he would send me a new pair, one size bigger. My mechanic says the local post office uses this stamp (not this particular style) and has for years; it serves the local post office. It's good. I think if the chains are the right size they are very easy to put on. I'll report back when I have the spare chains. At the same time, I am very satisfied with the customer service. The new chains arrived in about a week and they fit. They were easy to install. There will be a lot of snow in a few days so I will be ready.