Just picked up a solar generator/power plant. I needed an adapter to attach my custom solar panel to it. I was planning on adding a 10 amp fuse and then found this one with a built in fuse. It fit perfectly and nothing else needed to be done. I was able to get it working right away. Supplied with seat belts in a resealable plastic bag. Fuse holder and fuse are already attached. One end had an SAE connector and the other 5.5x2.1 with correct polarity. This is a "Plug and Pay" item.