Our vertical dumbbell racks are the optimal space-savers! We have an assortment of styles to choose from. The small footprints make them ideal for use in limited-space environments. We offer 2-sided and 4-sided designs Depending upon your special needs and budget, there’s a good chance that we have a rack for you.The Industry’s Most Dependable Hex Dumbbell. Dura-Bell dumbbells have a patented design that makes them maintenance free. Urethane encased heads minimize damage to floors and equipment. Our 35 millimeter ergonomic handle features a hardened chrome finish and is secured to the head with a quarter inch roll pin. Our US Patent # is 6099443. The only patented urethane hex dumbbell in the industry.