The composition of these fitness implements varies depending on the intended use, manufacturing era, and cost considerations. Common materials include cast iron, steel, and rubber, often combined in different ways to achieve specific performance characteristics. For example, some are constructed from solid metal, while others feature a metal core encased in rubber or neoprene for enhanced grip and floor protection.
Understanding the construction provides insight into their durability, maintenance requirements, and overall value. Historically, materials like stone and crude metals were utilized. Modern manufacturing techniques permit precise weight calibration and ergonomic designs, contributing to safer and more effective workouts. The choice of constituent materials influences the longevity, aesthetics, and suitability for various training environments, from home gyms to professional fitness centers.
