Sold by McKee Professional Group which is a small machine shop in northeast Ohio in the USA. All of our items are things we do not use that are purchased from auctions. Everything is high quality and we check through all of our products before listing. We do not purchase or sell any knockoffs, everything is name brand and genuine. Contact us if you have any questions about our items and we would be glad to answer any questions. Help support small business in the USA by purchasing from us and thank you for your interest in our products.