Escape Climbing 9" Power Piston | Premium Wood Training Tool for Grip Strength | Maximum Upper Body and Core Workout for Rock Climbing and Bouldering HIGH QUALITY | Specifically designed piston with robust Ash wood and sturdy hardware VARIETY | Provides multiple heights and widths for specific next-level training exercises CHALLENGING | The pistons push your workouts to the next level and maximize your results HANDCRAFTED | Materials are sourced in the United States and assembled in St. Paul, Minnesota