Love these wheel chocks. I have a wheel jack on each of my utility trailers and one for our log splitter. They make trailers strong - I don't even need a chock on a slight incline (but I use a pair anyway). What we like best is the option for the log splitter. We pull the log splitter to where we're splitting with our tractor or ATV, and once the jack wheel is in the round block, it stays right where we want it and doesn't move at all. I like the wheel jack on the splitter because I can level the jack handle. Very happy with this product.