Micro Connector Pin Crimping Tool 0.03-0.52mm² /32-20AWG Ratcheting Crimper for Molex,JST,JAE open barrel terminals(WKS-3220N)

Using the correct operation, these guys work great. They crimp the connector perfectly. But, you do have to watch a video or two to completely understand them because of the narrow margins required for setting up and aligning.

Looking for a JST-XH 2.54mm crimper? Look no further! The SN-01B is the correct tool for XH crimps. The jaw width is 4mm, the size you need!

These were recommended and they worked great

For anything Molex, this is the best crimper out there. No instructions, so I was using it completely wrong at first and hated it. But then I noticed that the dies have two stages- this thing crimps both the conductor AND the insulator at the same time! And once you use it correctly it makes a crimp as good as factory. There's a certain satisfaction in owning a well-made tool that does its job well, and this crimper meets that description.

used on hundreds of crimped wires out of the box without any issues.

It feels solid, works as advertised and gives nice crimp connections.

Ordered this crimper for JST connectors. I have another 18-28AWG ratchet crimper that works OK but in theory the parallel jaw movement on this tool makes crimps that are stronger and more consistent. That's the theory. In practice, it's a lot harder than it looks. First, you need to figure out which slot to use as there are no markings. Once you get the terminal in the right slot, the terminal has a tendency to rotate while crimping because the crimper applies pressure to the narrow back of the terminal and there's really nothing to hold it straight. If you manage to keep it straight, if you haven't inserted it just so you have a pretty good chance of crushing part of the business end. In short, it takes a lot of practice, but if you manage to get it just right this tool is indeed capable of making a very good crimp. It's good for hobby use but I'd get the purpose built tool if I needed to do a lot of JST crimps.

They may be great crimpers for certain connectors listed but they’re terrible for crimping Molex Microfit 3.0 which is the only reason I purchased them. They bend the connectors and trying to even perform a pull test by hand the wire breaks. I’ve been IPC-620 certified for years and had zero issues with other crimpers. No matter how much I tried they wouldn’t work correctly. Some of the other connectors listed these may work fine for, but do not purchase them for Microfit.

I'd stick to iwiss/icrimp or ENGINEER. These have solid well machined dies but the action doesn't release smoothly and doesn't feel anywhere near as well made as those other respected brands. The slightly cheaper price isn't worth the hassle.