I am a professional mechanic. I needed them for MAF sensor bolts on Mercedes and IAC/other parts on Hondas. In fact, this is a sales tool. I have used them in one swoop and by hand. Sure, they're not Snap On, but they haven't shown any signs of wear and tear, and the few times a month I use them, they're perfect. I have bought other Neiko sockets and have always been very satisfied. If you compare the price of tool trolleys to what you get, you really can't go wrong with this set.