Specifications: Dumbbells are great workout equipment, if you prefer to exercise in the comfort of your home. It's small, can easily be stored in a closet, under the bed, fit for anyone who love to workout with convenience. Hexagon shaped heads prevent rolling and provide easier storage, knurled ergonomic handle prevents slipping and provide a comfortable, secure grip. Made of solid cast iron core for reliable strength, Rubber coating helps prevent damage to floors and equipment. Dumbbells are widely used in gyms and homes for various exercise purposes, a great tool for either full body workout, or specific muscle groups. such as abdominals, Chest, pectoral muscles, biceps, triceps. Feature: 100% brand new and high quality Material: Cast Iron Color: Black Applicable scene: home fitness, fitness club 5/10/20Lb: 2pc 30/40/50Lb: 1pc