Well I finally picked up a hitachi 6 amp angle grinder with 5 grinding wheels included and a case included! it was only 50bucks... So I also bought 2 thin straight cutoff wheels allong with 2 of the thicker slightly recessed cuttof wheels, Which ones are the best? I know the thin ones prolly because it leaves more metal but I think I could get mor life out of the thick ones. What is your preffered disc for scrapping?