I started purchasing these as an alternative to heavy solid rubber chocks for trucks. They are cheaper than typical solid rubber chocks and much lighter per set which is appreciated by staff that has to pick them up and put them down on the vehicle several times a shift. Also, great way to limit the chance of repetitious MSD injuries due to their light weight. Usually get 2-3 years out of a set which is a downside compared to their solid rubber counterpart and have to re-secure the I-Bolts occasionally as they come unsecured due to repeated use. The positive reasons above outweigh the negatives, which is why I solely use these chocks on all of my heavily used PIT equipment. Highly recommend this product if you are looking for a reasonably priced and lightweight chock.