The Baseline Tuning Fork 6-piece set plus striker evaluates hearing and vibratory sensation with a set of 6 tuning forks to choose from. The added Baseline Striker is a tuning fork mallet used to activate tuning forks. The mallet is designed with a spherical hard rubber head and an easy to grip hardwood handle. By striking the rubber head of the Baseline Striker to any of the tuning forks in the set, it will produce clear and sharp tones. Use it to help you achieve accurate and precise tuning wherever you are. Included are the 128, 256, 512, 1024, 2048, and 4096 cps tuning forks as well as the striker. All of which are conveniently found inside a carrying case.