Male DC Power Adapter, 2.1 mm Barrel Plug to Screw Terminals, Package of 5

Finally, a simple way to hook up my power supplies without soldering — the screw terminals hold wires securely and the positive/negative labels are a lifesaver. I've used two so far from the pack of five and they're perfect for my model train layout.

I needed a few of these for a model train layout, and the screw terminals made wiring up the lights painless. The positive and negative labels on each connector are a huge help when you're working with a bunch of wires, and the set of five gave me spares.

Finally, a DC adapter with clearly labeled screw terminals—no more guessing which wire goes where. The 2.1mm barrel plug fit perfectly into my layout's wiring setup. These five connectors will come in handy for future scenery projects.