I use a 18v Makita rattle gun has a built in clutch . It stays charged for a couple of months but you still need to be careful you can over tighten. If you go too hard you may break the Ali thread and that can lock on the bolt and stop it from coming out , so best way as Colas says use some tef gel and use a hand tool for last couple of turns . Best part of the rattle gun is disassembly takes seconds .