Anyone remember John close he use to refurbish welders ? I asked on here a couple years ago about my miller 200le welder generator it would make power on the outlets but it wouldn?t make enough juice to weld John (the carvel Minnie farmer ) responded and sent me these stones free of charge from Canada to clean up the commutator rings . Well it?s been a long time and now John is gone but hopefully next week I can finally follow up to my original post and let him know if it worked or not I?m sure it will because the commutator rings were black as well anyway there are a shiny brass color now . I had to order a new starter from eBay and also new plugs for the leads they?re a smaller size than anything available locally .