This tool set has sold me more Snapon wrenches than any number of flyers, promotions or trucks. It's possible to "lose" an irreversible key in tight spots if you're not careful. The ratchet in all smaller wrenches is rough and they tend to change directions and stay in place without warning, turning the ratchet wrench into a large regular combination wrench. Overall just bad quality. I was sent on a trip abroad to work on a hydraulic manifold on a CRJ 900 and I was trying to get the nut off. I had no access to the end of the box, ratchet or pliers; it was the open end of a combo or a chisel, and I didn't have a chisel. The first wrench I got my hands on was a serrated one, so I placed the open end on top of the nut and rounded it off. So I rummaged around and found my snapon wrench, same size, same nut face, and voila, it fitted right away. That means I threw away practically all the money I spent on this set; I will go back and buy a new set from the best manufacturer.