Molex Connector Lot, 5 Matched Sets, (4-Circuits) w/18-24 AWG, Pin Size: Standard .0165" 4.2mm, Mini-Fit Jr ™

These are very well made, they fit just fine for my use.

Works fine lasts a long time.

just what I needed to make a repair

As others have said, you'll need the Molex crimping tool OR a lot of patience and precision. First, please note that the male pins are installed in the female looking connector which is the "receptacle" side (or board side) of the Molex connectors. If you try this the other way around, the pins won't fit. Second, the Mini-Fit Jr insulation crimp is designed to wrap around the insulator and not pinch in too it like most other crimps. To this end, you'll need to trim down the insulation crimp fins a bit if you are using a generic crimping tool. Finally, the jaws on the Knoweasy Molex Crimper 1424A are too wide for the male version of these pins. It will work but you have to almost crush the insulation fins when preforming the wire crimp otherwise you'll crush the locking pins on the back of the pin.

Molex are great connectors. Simple to crimp

worked as it should

These connectors are tiny, they come on a strip intended to be used with a crimping machine. They can be crimped by a hand tool but not easy. They have to be inserted in one direction only to lock in, very difficult to do, good luck.The nylon connectors themselves work very well. They are well defined for proper oration and lock together well and come back apart easily.

I bought this item to make repairs to an antenna controller. It had exactly what I needed to make the repairs I needed.I would also get the extractor tool for easy removal.