DC Power Connector 20 Pairs CCTV Power connectors 12V Male+Female 2.1x5.5MM DC Power Jack Plug Adapter Connector for CCTV Camera and LED Strip Light

The supplier correctly delivered the product, everything in order.

These are great for a temporary fix. They are a bit cumbersome, especially for thin AWG gauges.If there is a need for a permanent fix, it is better to get the "Pigtail Cable Wire, 12V 5A Male & Female 5.5mm". If I have known about these pigtail cables first, I would have not bought these connectors.

These are great for DIY projects, testing, temporary installations, etc. When I make items with my 3D printer that require 12v power, I make a perfectly sized opening in the item for a connector, so you have a nice clean and stable port embedded in the item. The trick with these is to get the wiring stripped at the right length that it fits into the connector enough that the insulation of the wiring will be clamped in addition to the bare wire. Otherwise, the bare wire is the only thing connected and that makes it weak and susceptible to breaking. That's especially important if these will be at the end of wire instead of embedded or fixed onto an object. If you get a tiny bit of the insulation into the clamp as well, these are strong and durable. I would not use these outdoors!

Out of the 20 about 5 were DOA either due to poor voltage continuity or bad screw terminals. Then another 2-3 went bad over time (voltage begins to drop). They’re fairly sturdy in terms of build so I’m not sure what inner components/wiring they’re using to cause the continuity issues.

Pretty straight forward with these. They work just like they are supposed to.