For any electrical project where you need to join two wires end-to-end, these Morris Products butt splice connectors are a must-have. This pack gives you 100 non-insulated, electrolytic copper tubular splices. They're rated for 22 to 16 AWG wire sizes (American Wire Gauge), which covers a lot of common automotive, trailer, and general low-voltage wiring jobs. They're electro-tin plated to resist corrosion, and each one has a handy center stop barrier so you can insert both wires to the middle for a solid connection. You'll need to crimp them with a proper crimping tool and then add heat shrink tubing or electrical tape for insulation and protection. They're rated for up to 600 volts and can handle temps up to 302°F (150°C). They're cULus listed for safety, so you know they're up to code. Whether you're fixing a broken wire, extending a run, or doing custom wiring in a car or boat, having a box of these on your bench makes the job quick and professional.