Mike Bartos is a gym owner from Youngstown, Ohio. He is a man I know personally from going to his gym for the past 4 years. Over many years he was trying to figure out how to make an atlas stone that can have variable weight settings. An atlas stone is generally a large sphere that is made of concrete and has one weight. It is used in strongman competitions and training. Instead of having a bunch of concrete spheres laying around, he knew something had to be done. This led to many prototypes and testing to find the perfect stone. He created the Stone of Steel: the worlds first plate loaded atlas stone. This black stone is capable of weighing either 130 pounds up to 450+ pounds. This was a major innovation in the strongman community. He has since added many other products that are very useful. He prides all his products on being American made with American steel. He has been entrepreneurial in his field and has made a major innovation in stone training.