100 lb Dumbbells Set: Includes a pair of 5-pound, 10-pound, 15-pound, and 20-pound rubber hex dumbbells. This set in multiple boxes. Dumbbell Construction: Made from Solid cast iron and rubber encased heads joined together by a solid cold rolled steel chromed handle for lasting strength and durability Innovative Design: The hex-shaped design to prevent rolling and provide easier storage. Textured ergo handle provides essential grip and security during use Versatile Weights Dumbbells: It can be used in a variety of upper and lower body and core exercises, such as perform curls, presses, squats, or lunges; provide the perfect resistance for targeting different muscle groups at anywhere: the gym, home, and even outdoors Multifunctional: Perfect for building and toning your muscles, burning calories, shaping physique and increasing metabolism. Ideal for all major muscle groups such as arms, chest, back, core, and legs