I have never understood why people buy these expensive tools. I bought it as a replacement for one of my colleagues. I used it and it broke. Done with the Pittsburgh Allen from the harbor. Ordered this one and you know what. He broke too. Who finished the work? harbor fear. I can get a full set of port freight for the cost of this scrap. As a mechanic, I use tools 12 hours a day. Cheap tools all day, son