Feature:1. The whole ball is solid, and there is no ring tone difference (a single shaking has no ring tone, two balls collide with a collision sound), suitable for strength training2. Smooth and shiny, healthy and environmentally friendly, not afraid of water or sweat, not rusty and shiny3. By twisting the fitness ball, the upper limb muscles such as fingers, wrists and elbows can be exercised4. Hand ball is easy to generalize and difficult to master, and cannot be done quickly, which makes people more patient and calmly to face life5. Fitness equipment provide health massage, stainless steel material is anticorrosion, durableSpecification:Item Type: Hand Steel BallMaterial: Stainless steelModel: SolidSingle Ball Diameter: Approx. 50mm / 2inOne Pair Weight: 1050 g / 37 oz(approx.)Applicable Scene: Fitness equipment, health massageSuitable for men's primary use (average hand strength).Package List:2 x Hand Steel BallNote:Keep clean and dry when not in use, and avoid violent impact. When not in use for a long time, you can apply wax or oil to seal and store.