This cord is nicely made and very thick. This fits my Firman tri-fuel generator and will allow the use of both phases of the 220V to generate dual 120V outputs. (note - it doesn't convert 220v to 120v, it splits the 2 phases off into 2-120v legs). Firman includes an adapter like this, but it's only 2' long. This is essentially the same, but 25' long which will allow me to use my 120v cords further distance when I'm running off the generator. And it has 4 outputs - 2 on each phase, giving me more available 120v plugs on the generator. In reality I hope I don't have to use this much for the hurricane season here in FL, but if I do need the generator again, this will be a big help. It's nicely constructed, thick heavy-duty wire yet is flexible, and has a nice carry strap. Overall, I'm very happy with this.