HIGH-GRADE SOLID CAST IRON CORE: With premium cast iron as main material, Yes4all Hand Weights Sets are right for any exercise without bending/ breaking. Great for arm rows, squats, chest presses, bicep curls, walking, jogging, yoga, etc. NON-SLIP HANDLE DESIGN: The handles of these weights dumbbells have a premium Neoprene-coated finish, offering the ultimate in your comfort and non-slip grip. Plus, the coating forms a protective barrier that protects your floors from damage