Review on WAGO 221 Series Splicing Connectors with Compact Case: 25pc Wire Connectors Bundle - Includes 10x 221-412, 10x 221-413, 5x 221-415 by Kevin Fuentes

I love these wire connectors. There are some out there and even here at Revain that are NOT UL or CE approved. Definitely don't buy them! Make sure they have at least UL and CE ratings because you don't want to trust them in your home! WAGO 221 is UL and CE certified. They are extremely easy to use, eliminate control box clutter, keep boxes looking clean, are safe when used correctly, and if you need to remove/replace wires you don't have to re-cut/strip wires like you do do it with wire nuts.