Ultra-FabProducts 21-001080 X-Large Ultra Chock and Lock

Just what I needed. Works very well on my 5th wheel and keeps it from moving at all. Easy to use and customer service is very good to work with. Speedy delivery.

while it takes a little work to adjust correctly the first time it is used, it is very solid. We used the smaller ones for years on our old camper but those were too small for the new camper.

This product was shipped in it's original box new and was exactly what I expected. I received it quickly after ordering.If you are close to the minimum distance between tires, they are a little hard to fit between the tires. I was able to get them in with a little elbow grease. I decided to order these rather than the other model they offer because I wanted the heavy duty ones. The lighter duty ones may have fit a little better though.Once adjusted properly, all it takes is a quarter turn swing of a lever and they are latched in place. I believe my trailer is much more secure than it would be with regular wheel chocks!

This item works very well in stabilizing my trailer. However, I recommend still using the under the wheel chocks if you are on a slope. The tires can still skid. This is not a negative to this style of chock, you still have to deal with gravity.

This is really nice, trailer will not move when this is in place. Easy to put on and take off. Love that you can put a lock on it. Really stops the trailer from rocking. We have a 26 ft trailer. Funny story told husband to remove it a few times before leaving, didn't go behind him to see if he did it when we got ready to do .... the truck would not move????why did you take off the tire lock thing, No, well now the truck will pull the trailer and off on our vacation.