Specifications: Pair of 2 balls with matching webbing for training grip strength, rock-climbing, American Ninja Warrior training, Parkour, obstacle racing, etc. Our climbing holds can be used in a variety of different style workouts and an infinite number of exercises. Simply wrap the strap around a bar, dumbbell or barbell and execute your favourite exercises. The ball is made of composite material, the hook is made of 304 stainless steel, the webbing is made of Nylon, the ball has many spherical grooves, so your hands are not easy to slip off. Item Name: Pull-up Balls Material: 304 Stainless Steel + Nylon Load Bearing: 120kg Features: Durable, Strong Load Bearing, Fitness Tool Ball Diameter: 7.2cm/2.83" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 2 x Pull-up Balls 2 x Hanging Straps 2 x Hanging Hooks