Haisstronica Crimping Tool for Non-Insulated Open Barrel Terminals Receptacles,AWG 20-10 Ratchet Wire Crimper Tool,Wire Terminal Crimper HS-5327

Does a really good job. Used it to attach 20 ga stranded wire to spade lug connectors. I wasn't prepared for how much strength it took to do the crimping, but the device is "ratcheted" so if you pause you can continue on until the crimp is done.I remember the cheap stamped crimping tools were easier to use, but when you compare the quality and ruggedness of the crimp, it's easy to see how much more robust this tool makes the attachment of the wire to the lug.One thing I noted - when you think you are all crimped, if the tool hasn't gone "over center" you're not done. By "over center" I mean that after applying a lot of force to close the jaws, the tool suddenly gets much easier to press and the handles come together completely. Up until that point you haven't finished the crimp.For verification, I used an ohmmeter to check the connection; not only are the lugs well attached to the wire with a little pull-test, they are electrically good as well. No one wants to be searching all over for a bad connection, or have one of the lugs come loose from the wire when you put a little strain on them.I haven't tried connecting larger wire so I can't say how much pressure would be required; the 16ga to 22ga part of the jaws is on the outermost part of the tool, so it may well require the most effort to use.So while I was surprised by the work it takes to use this tool, I have decided that is due to the thicker jaws making a broader crimp, compared to the cheap sheet-metal crimpers, resulting in a very good connection. For that I give the tool five stars.

Wow, I am seriously impressed with this crimper!After getting this out of the included storage case, I used the heat shrink crimping jaws to crimp a heat shrink spade connector on a 16 AWG wire, and it worked perfectly the first time. Then I changed the jaws to the insulated connector jaws, and I crimped an insulated connector onto a 20 AWG wire, and it worked perfectly the first time. That is two for two, on two different style crimp connectors, with excellent crimp quality and holding power! I have never had that type of success with any other crimpers I have used.I'm definitely looking forward to continuing to use these, and expect that they will work very well for my occasional wiring needs.Changing the jaws was pretty quick and easy with a screwdriver. However, one slight challenge I had with that, is lining the top and bottom insulated connector Jaws up with each other. I say slight challenge, because it really was just a small challenge/inconvenience. If I seated both the jaws fully into the crimper, then the two jaws weren't perfectly aligned with each other. What I did to remedy that, was simply to tighten down the bottom jaw, and then align the top jaw with the bottom jaw before tightening it down. No big deal, and seem to work very well.This is a good one, just like the many other positive reviews show!

Very nice. High quality you can right when you grasp it, The ratcheting action is very smooth. Did two quick open barrel crimps and both turned out flawless. Between the grips, ratchet action and the weight of the crimper, it is a pleasure to use.The only other thing I can mention is the connector does get stucj in the jaws after the crimp. Not a proplem for me as I have a tiny pair pliers that I use to pop them out. I'm assuming this speaks to the quality of the die sizing with the crimps coming out perfect. I don't think I would as good a crimp with sloppy / looser tolerance die.Thank you Haisstronica for making a great tool at a great price... good job!

One of the best tools I've bought on Amazon when it comes to solar instal tools. Lots of use.

I am new to making electrical crimps, have small hands, struggled with other basic crimping tools. I figured i just did not have a grip strength. This ratchet wire crimping tool has changed everything. When i crimp with this tool, it feels effortless in comparison. I do not feel the metal handle digging into my hand. It gives me a measure of when the crimp is complete. It works well for me. I get alot more quality crimps done in less time with the confidence of it holding.

Heavy duty and works very well. Great product!

Currently using them for my trailer rewiring project. Using with some open barrel slices I also got from Amazon and, with a little trial and error, figured out what size splice and size groove works best for my application. Crimpers are easy to use and seem stout. A little learning curve but work well.