Made of solid cast iron, weight marked in LB, perfect for home exercise and gym training, Efficient tool for strength training to build all major muscle groups including chest, arms, back, legs and core ★ Durable rubber-covered hexagon heads, prevent rolling and easy to storage. The heads are threaded and permanently attached to a solid steel shaft, thus enhancing the strength of the head and handle joint ★ Chromed, ergonomically contoured, knurled handles, easy to grip and non-slip. fit comfortably in any size user's palm ★ The rubber coating increases durability, protects flooring and equipment, enhances appearance, diminishes noise and is easy to clean