I have the ENGINEER PA-09, PA-20, and PA-21, although I've only needed to use the PA-21. It works okay, just note that the crimping area length is only about 1.5 mm, so you may need to crimp twice. For large pins, the short crimping area can split the wings that fold over. Otherwise it seems to work well. It's well made and doesn't feel loose. I probably did 100 of those large Molex pins and it still works fine.