AIRIC UL Listed Non Insulated Butt Connectors 12-10 AWG, 100 pcs Electrical Seamless Crimping Terminals, Uninsulated Wiring Crimps Connector, Bare Copper Crimp Splice Terminal for 12,10 Gauge Wire

These are officially the best butt splices I have found on amazon. They grip the wire well if using the propers crimpers. I use a set of T&B’s or Kleins. Don’t skimp on the crimping tool and these will do just fine. They don’t have a seam and the metal is super thick which is why they hold so well. I have never had a wire pull out of these. I always put some adhesive lined heat shrink over these after crimping. I always keep these in my electrical box at work and home.

Did the job . Quality product.

Nice thick copper walls. Sizing is appropriate. Connectors hold a crimp.

Works great, strong and solid crimps. I used this along with marine grade heat shrink tubing, and I will do it this way from now on. I will never go back to the insulated crimp connectors.

If you want quality connections and also thrifty with spending, you should look no further. From rebuilding auto harnesses to system wiring, these are the best quality product that I've found online. I have almost every size from 28 to 00 gauge wire size connectors. It makes a big difference on thickness of the connector and the material used (i.e. tin, copper, silver) when it comes to current flow and longevity of connection made. I don't like to go back and recheck and fix bad connections as that takes time and costs in the end. I will be utilizing this specific manufacturer and product frim now on.

These are very sturdy, will need a good set of crumpers or a very strong hand. They seem to do a good job trapping the wire, used these with heat shrink

Works great

Good quality, thick enough to get a firm crimp and it not pull loose.