I usually have no problem buying aftermarket quality rental equipment, I just want it to work, it doesn't work. If the company had ever tested this product, they would have known it didn't work. The problem is that the original has a metal ring around the base to reinforce it and this one doesn't. Once you use it, the base will round off and won't work with the winch. After this block failed the first time I got a set from my wife's country house, what's the difference, it works fine. I have attached a picture of the GM unit and it clearly shows how cheap and thin the square socket on this unit is compared to the original. Thing is, this thing doesn't work; If so, it will not work for a long time, this part may cause you to get stuck at the roadside, please remove this product from Amazon, it may cause real trouble for people.