Review on TRACGRABBER Snow, Mud, and Sand Tire Traction Device for Trucks and Large SUVs – Set of 4 – Easy to Install, Efficiently Get Unstuck – Ideal Snow Traction Mat or Snow Chain Alternative by Frank Harwood

First of all, they work surprisingly well. I'm stuck at a lake in deep snow. I put them on and drove off with no problems, in fact I drove a few miles and they were fine. My problem was they got so tight I couldn't take them off! I have contacted the seller and what they wrote follows (tried, works fine); Hello and thank you for contacting us. We're sorry you're having trouble uninstalling Trac-Grabbers. During use, Trac-Grabbers can shift under pressure, making the belt very tight. In this case, you need to put the rubber back in its original position on the tire. This will release the tension on the strap and make removal much easier. If you can't move the hoop back, try turning it back a little. Another option is to move the car to where the tire is on the rubber block. This will also loosen the tension on the band so it can be easily removed.