
This wrench must be reversed to loosen/tighten. The special thing is the rotating end. The harder you squeeze it the tighter it holds the bolt/nut, so it's great for those stubborn bits that won't come loose. We used it on a castle nut for a trailer axle where the bearings failed and the trailer basically ran over 30 miles (ugh) on the castle nut. It was the only tool we had to unscrew it. The other end has a ratchet and is a 12 point style that bolts down to 17mm and works just as well. The only downside I see with this vein is that it's obviously not made of the best material, so I wouldn't put a long tube on it and expect it to hold up. Either way, it's still a 5 star key.