put a 20p nail head down in a quart beer bottle, make shure you drink, i mean empty it first put your thumb over the hole and shake up and down , the bottom will pop right off, i useually put mine in a bag so it dont break on the concrete floor, you can get the copper ground wire at any hardware store or lowes, home depot, it's cheap so get a couple feet, then put one end in a vice and chuck the other up in a drill and twist it till it breaks loose, it will be hot dont burn your self, this hardens the copper and makes it useable for knapping, you can also find all this in video form on youtube if that is easyer for youto watch it done first, good luck, Bub