FITactic FRC PT35-R 2pk 3.5 Inches Rock Climbing Solid Body Training Cannonball Bomb Power Pull Up Ball Hold Grips Pull Toys for Straps for Finger, Forearm, Biceps, Back Muscles (2 Balls, Red 3.5")Sanding may be required depending on desired roughness on ball surface. Includes: 3. 5" Diameter Power Ball + Nylon Webbing. Color Red may vary from the images. Come with REAL stainless steel hanger hook + FREE reinforced nylon webbing. Install anywhere! Pull Toys, Fun, safe, durable, open hand design. Muscles tendons lay ergonomically & train efficiently. Excellent to add into your workout routine. For safety, please use under height limit 7 feet.