Titan 11477 Ratcheting Wire Terminal Crimper
I've picked this ratcheting crimper from Titan as my favorite crimper. The jaws are clearly marked for the three common sizes of crimp-on connector and even more importantly, those jaws are ratcheting. While factory preset, the adjustment on the jaws is adjustable; this means that you can keep your crimpers working properly, even if something happens to mess up their adjustment. These will work with wires ranging from 22AWG all the way up to 10AWG. The molded grips are comfortable, adding to the pressure you can apply without hurting your hands.