PowerBlock, Inc. was founded in 1991 by Greg Olson and Carl Towley. After working in the institutional fitness industry for over ten years, designing fitness equipment for companies such as Parabody®, and designing the free weight and modular lines for Cybex®. While researching the specialty fitness market they were continually amazed at the mountains of dumbbells they saw in every store. There must be a better way to provide fitness enthusiasts with the performance advantages of hand weights without the space and cost penalty inherent in the old fashioned hex head dumbbells and racks. Thus the idea for PowerBlock® was born and after two years of extensive development and testing PowerBlock® became a reality. Dreams really can become reality. And hard work really can make dreams come true. PowerBlocks are the world’s best Dumbbells. Why? PowerBlocks are perfectly balanced. They are the heaviest, most compact and easiest to use quick change dumbbell. PowerBlock is the only dumbbell system that can expand to meet your strength needs. Start with a 50 lb set, expand to 90 lbs, expand again to 130 lbs. Dumbbells are the most versatile and effective exercise tool ever developed for strength training. Now you can have rapid access to a whole rack of dumbbells at home in the space of just 1 pair, and at a fraction of the price of conventional dumbbells.