Kuject 200PCS Lever Wire Nuts Connectors Kit with 2/3/4/5/8 Conductor Combination, Electrical Lever Wire Connectors Push-in AWG 28-12, Wire Quick Connectors with 2 Circuit Inline Splices

I purchased these to rework some wired connections in my van. Space was not a major issue, so these larger size connectors would do okay in that regard. I found them quite easy to use once you got used to the amount of force you need to apply to pull up the lever. The wires fit easily into their insertion points, and the levers snapped down and locked the wires securely into place. I tried to pull some test wire from the connectors before I started using them, to no avail. The connectors were not about to release the wires. This type of connector is one of the better and most secure ways I have ever used to connect wires beside solder. I recommend them.

As a retired electrician these make replacing old fluorescent lights with new led fixtures at church so much easier. Now I can just remove the old wire nuts and slip one of these new lever nuts on without even having to disconnect the power. With the clear sides I can clearly see the the wire is seared properly and add the other wires as needed from two or up to six as needed , I wish they invented these 40 years ago when I first became a electrician. I highly recommend these you will never go back to the old style wire nuts. P.s. these are easily reusable.

Great for accessory wiring on auto and ATV . . . relays, lights, power outlets, linear actuators, etc. Simple and clean connections that are reliable.

Quick and easy to use

I was planning to install a new car stereo, but I had my doubts whether it would actually be a good enough stereo to keep, so I wanted to use something like Wago connectors for all of the wiring. I'm cheap, so I picked up these. The Kuject's are slightly larger than Wagos (about 14mm tall, 9mm wide and 40mm long) but they cover a greater range of wire gauges than Wagos (28-12 gauge). I wanted that larger gauge range, specifically for smaller wire diameters, because some stereo wires (like for the backup camera) are very small diameter.If you're not tight on space, just buy them. Easy to open (even without fingernails), easy to close, nice large openings (so you can twist together two wires and stick them in one end [both wire jackets, if they are reasonable diameters, will slip into the connector] if you need to connect 3 or 4 wires), and the connection seems pretty strong (I didn't put a pull gauge on wires after insertion, but I pulled every connection at several pounds of force and saw absolutely zero give or movement).The only negative is the "stackability": theoretically, you can mechanically (not electrically) make arrays of these (like the bottom of the first photo of the Amazon listing), just by slipping a little protrusion on the side of one into a little slot on the side of another. This was pretty convenient for me, it kept my +/- speaker wire pairs together, and just reduced a little confusion and complexity. However, the mechanical connection is pretty unreliable: some pairs I connected kind of snapped together and seem very mechanically robust, while others fit together very loosely, and tended to disconnect while I was moving around. (Just to be clear, this is a disconnection of the mechanical connection between a pair of connectors; absolutely no electrical connection issues.)These are my go-forward wiring connectors; no more twist-and-tape, no more wire nuts.

finally decided to try these. I'm NOT disappointed! Just ensure the STRIPPED LENGTH is approx 9-10 millimeters per the Mfr. , the wire surface is CLEAN AND BRIGHT (i.e., scrub the copper with a piece of Scotch Brite) and the wire end is "fairly straight". Tightly "twist" STRANDED wire ends before inserting to prevent unwanted "whiskering" (i.e., loose strands). Ensure the wire is FULLY INSERTED (i.e., the wire "tip" is FLUSH against the rear!), then flip the lever so it's PARALLEL with the body (i.e., horizontal) to lock-down the wire.After locking, give the wire a gentle tug to ensure it's secure.I just used these things to replace a couple of light switches and out lets (12 so far and more to go) 24 year old wire nuts in my home. The "hardest parts" of the adventure were "unthreading" the twisted wires going to the nuts, trimming the stripped ends to length (they were "random" lengths!) After that, it was "plug and flip", stuffing things back into the electrical box, and remounting outlet. All things worked PERFECTLY after that.I expect a Long "service Life"* DO RECOMMEND ** these critters for necessary "rewire" jobs.

Work great! They stay closed after install, others I had tried would open easily while I was working with other wires. The case is nice!

Using these for LED lights and such. Not sure I would trust them for much else. Says they are rated up to 600v and 30 amps but the connections appear to just crimp down with a thin piece of metal. Probably fine for grounds or neutrals in higher amperage applications, but I would stick with properly twisted wire nuts for the hot wires.