Pure nickel tabbing strip is used to weld together lithium battery packs from 18650's or other cells using a pulse welder. It is fast, efficient, and neat. Our strip is 99.99% pure nickel, please don't be the smart person to post a bad review stating you got nickel plated steel, because you did not get it here. Yes, nickel is magnetic and it will stick to your magnet, but a little less than steel strip if you do a head-to-head comparison. For that you need to have both materials of the same size and thickness to compare. The pure nickel strip will not rust or corrode, and will outlast your project.