RockTape RockBallsRockBalls (Set of 2) from the kinesiology tape leader RockTape is a great way to perform self myofascial release with pinpoint accuracy. They are sold as a pair and feature a large spiky ball, a small smooth ball to give you two tools to break through tough tissues. Corrective exercise can and should be performed anywhere and everywhere. Keep your RockBalls at home, in the car, or even traveling. Every set of RockBalls includes an instruction book