Review on Efficient Insulated Seamless Butt Connector Pack for Reliable Electrical Connections by Adam Gambel

This is a good quality butt connector. They are quite strong, curl well and stay in place. My only complaint is that they don't have a size engraved, which is just a very nice feature for a normally non-functional component. As for some of the really cheap options, I won't get bogged down in such details, but for close to a dollar apiece I'll cover the nitty-gritty details. Grab some markers so I know what size cable they fit and you'll get a 5 star rating from me.