The parts n' more tappet set is basically a socket with a handle on it, and a screwdriver that goes through the center (I bought one a while ago). You do still have to use a feeler gague, but it sure makes the job a whole lot easier. Last time I adjusted the valves without the tool I had to have another person with me to hold a socket in a pair of pliers and a screwdriver at the same time, while I said, "Nope.. Oh, wait, back it off... there ok you got it ther.... Oh, wait lost it..."