Igreeman 10 Pair Quick-Connect DC Power Pigtails - 18 AWG, 5A - Comes with Unique Terminal Jack Socket for Top-Notch Security Surveillance & Party Lighting - 2.1mm * 5.5mm Connectors

The wires worked perfect and are of good quality.

This is the most common size of barrel jack I encounter. I like to test things that come with a wall wart running on car battery, vehicle alternator power, 24v wheelchair power, or DC-DC converters. I only needed one when I ordered this, but have since found a use for every single one.18AWG wire is a little thin for some projects so next time I'll look for some a little thicker, and with larger screws.

These plugs work well! My only complaint was the smell. They have a strong order and months later it's better but still there. Overall it's not a bad deal.

These adapters made connecting the power cables for our security cameras much easier. We had one cable that was not working correctly, but after contacting the seller it was promptly replaced.

These pigtails are of excellent quality. They are great for connecting raw wires. Bare wire ends slipped in easily with no wire strands bending back. Wires appear to be much more secure than using the old twist caps.

Ordered several bundles of these wires for low voltage projects (12V or less). The batch I ordered used "like new" arrived melted in many places. These got returned as defective. The other new set arrived fine, except one female barrel plug arrived crushed. I'll blame the flimsy, crushable packaging for that. I did take the damaged assembly to get a closer look at the wires. I was pleased to see the wires were copper, but stranded core about 1mm in diameter, which corresponds to the advertised 18AWG. This (stranded) wire guage is only rated for 2.3W of power delivery. I wouldn't trust half that rating, as the coating is a stiff PVC plastic with an extremely low melting and ignition temperature. I may use this for some bench tests, but definitely not for permanent use.

Worked great for hooking up our cameras to the DVR after running our Coax.

Worked for for the cable i was using. I may pirchase more later in the year.