Escape Climbing Power Piston | Premium Wood Training Tool for Grip Strength | Full Upper Body and Core Workout | Rock Climbing | Bouldering | Two Pack 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 DIMENSIONS | 8 Long | S 1.5 diameter | M 1.75 diameter | L 2.25 diameter | XL 2.75 diameter