Crimping tool works like a charm. Guide attachment holds the contact pin while you crimp. Crimps around the wire and rubber seal in one squeeze. Ratcheting action ensures you crimp just enough without over or under crimping. Only misfired twice by putting too much pressure on the wire leading to crimp around the wire insulation instead of the stripped wire. Thank goodness Mike included a few extra pins and seals. Should I have cut the wires for the turn and brake lights shorter? There seemed to be quite a bit of length on them.