Everything worked as it should, would have given 5 stars except the wire stripers provided did not fit over the MC$ cables they are meant to cut / strip , so you have to "fuss" with things to get the wire prepped just right. Wire stripers need to have a larger strip section for larger (common cables) cables. ,,,Crimpers are quite good.Perfecto para el uso de conectores mc4I have tried to crimp MC4 ends with other crimpers and they are never as clean as these crimpers. The old saying right to for the right job is very true using these crimpers. Its always a pain to climb on the roof and not have all the ends with having a complete set so the ends are very handy helps. I would buy this set againI was impressed with the quality and the price was very reasonableThis crimps just fine without the pin holder. The Pin Holder is trash and didn't work on my crimpers.I liked the easy useEasy to use and a great carry case to store itProduct worked fantastic for mc4 connectors and arrived 2 days after purchasing. Will be buying more.