Based on my observations this product is a total waste of money. It did not perform as expected and actually caused more harm than good. The only pro I can think of is that it is affordable, but even that is not worth it if you end up damaging your automotive tires .The cons are numerous, including the fact that it is not durable and has a poor design. Overall, I would not recommend this product to anyone in need of Tires & Wheels Parts..