Heavy Duty

What kind of cable to use to make my own custom Heavy Duty Extension Cord 16 amps and even tools.?
There are plenty of cables heavy duty extension there, Ridgid makes, makes the Workforce, Husky does. You know, for use in circular saws and other things to cover Mexican Group Analytic correct. What kind of cable are the strings? I intend to do mine.
I used 12 / 3 "good" feeder "with" hospital grade "plugs for my extra extra large high definition cables. This thing is stranded wire, rubber-coated exterior. 125'ers I have two. Specialized in barns, I am often away from sources of real power. I have no negative effects, these cords used with generators (and therefore the length, keep the things noisy as far as possible) by running 2hp compressors, saws to cut, circ saw, works. I hope you
Spinal Tap Heavy Duty