For what it's worth, US Air Force Jet Engine shops are stocked with Snap-On tools. They are provided by a contract which is really a good deal for Snap-On, The USAF and the tax payer (and mechanics of all types). Jet engines require a lot of special tools and strong, thin wall sockets and end wrenches are the more common one. You should see the tool boxes in these shops. First, they are all arranged identically, drawer by drawer. Secondly, each and every tool is in it's place. Third, ever tool is assigned a number that is engraved on it, which identifies it with each individual tool box. Each mechanic checks his box out starting a shift and checks it back end at the end of the shift. He checks to make sure every tool is in the box before he starts to work, and every tool is replaced when he checks the box back in. If one is missing, nobody leaves until that missing tool shows up. First, you can't risk a 2 Million dollar engine grenading from a socket whirling around in it, or a 100,000 million dollar aircraft crashing from a trashed engine in flight. Second, pilferage of high dollar tools that the tax payers have bought is frowned upon!!!! This is the best tool program I have ever seen.