Perfect for bread-boarding, free wiring, etc. This box contains 6 spools of solid-core wire. These spools of solid-core wires are easily soldered to, keeps its shape pretty well when bent and is rated 80C and 300V (UL AWM style 1007). We like to have a few spools of this stuff around which is why this set is quite nice! We suggest picking up wire strippers to match. Wire gauge is 22 AWG which we've found is the best all-around gauge, it works best with breadboards and perfboards but also fits in terminal blocks nicely