One piece solid cast and steel head design encased in rubber offers accurate weight and precision balance • Same construction as the 828RR Dumbbells • Solid Steel Heads • Precision drilled and bored to ensure close tolerance • No bolts or plates • Heads will not come loose or rotate • Rubber Encased • Embossed logo and increment treatment • Encased with a durable hard shore rubber • Bar size: 32mm • 3-Year full commercial warranty against breakage