Practical: Spherical shape increases forearm and grip strength, boosting endurance High Quality: Specially designed ball with Solid TPE material. Anti-skid design improve your exercise performance Fun and Open-hand Design: Muscles tendons lay ergonomically and train efficiently Easy to Install: Come with stainless steel hooks and reinforced nylon webbing. Can be installed anywhere Ball Diameter: 3.1"/8cm, fits for normal & men handsHanging straps length: 5.7inches Rock Climbing Pull Up Power Ball Hold Grips with Straps for Ninja Warriors Bouldering Pull-up Fitness Workout Product Description: Improve your grip strength. Great addition to home gym, kettlebells, pull up bar. Our Power Grip Balls are the perfect training tools for working grip strength while doing pull-ups & Fitness. Our 2.8inch diameter grip balls provide a radius for open hand training. From pinch strength to core exercises the Power Grip Balls provide more advanced rock climbing training options. Specially designed ball with Soft solid plastic. Anti-skid design improve your exercise performance. Specification: Weight: 2 Grip Ball - 9.8oz/ 280g, Stainless Steel Hooks - 12.3oz/ 350g Material: Ball - Plastic, Straps - Nylon, Hooks - stainless steel Color:Gray Packing List: 2 x Grip Ball 2 x Stainless Steel Hooks 2 x Nylon Webbing