Pro Therapy Supplies, located in the metro Atlanta, GA area, is an authorized dealer for Sling Shot. Their first product, the Original Sling Shot was invented by Mark Bell as a way to train the bench press while hurt. He is a top level powerlifter and benches over 500 lbs. raw, so he often dealt with nagging pain in the shoulders and elbows. He came up with the Sling Shot as a way to bench heavy without pain. All Sling Shots are easy to use, just slide them up over your biceps and start benching.