Well I haven't realy got to test it out to the max but I changed a few tires on an off road trailer I have and it worked flawless. The only thing I do not like about it is that you have to push the pin with a nail or screw to get the impact socket off through the socket hole. If you dont line the pin up with the impact hole it's fine. I have a small impact extension I can put on it but that will take away from the power. So far it kicks ass but having to poke the little pin with something is a downer. I'm used to the ball bearing that keep the socket on. You just pull the socket and it pops off. This has a point on it that keeps the socket from coming off. I will probably just tie a little rod with a hole drilled in it to the pocket clip so I can just poke it and pull it off?