I decided I needed to buy a wheel chock after changing a tire on a woman's van. The van was partly on the road and on a slight incline, but could not be moved. When jacking up the van, it started rolling (which was my fault for not hitting the brakes) and consequently ruined my jack. I read a few reviews of other pads but the cheap plastic pads just popped up. good cheap. When the last one arrived it was bigger than I expected (although I haven't read the specs). While it may be designed for tractor-trailers and warehouse work, it performed well in my testing. I parked my car on a slope of about 30-35 degrees and then pushed the chock under the wheel. Next I put the car in neutral. My car didn't move an inch. I understand that this may not be typical use of a wheel chock, but this is how I will use it. When I wanted to remove the pad, all I needed was a tug. As other reviewers have pointed out, the pad is hollow on the inside. I believe this design encourages utility. This allows the pad to compress slightly and give it more grip. The extra eye hook is durable and handy when you want to add a rope or chain. Because this last is made of high quality rubber I have a feeling this last will last for years even after being accidentally run over many times. on the. Hope Review he2007 lyndon ave apt b red bank tn 37415lps. Sorry I didn't include the molecular makeup, smell, or texture of the rubber as some people here on Revain are interested in all sorts of weird stats.