Premium Commercial Urethane Dumbbells Most commercial dumbbells are replaced every 3–5 years. Cracked rubber, faded markings, heads that wobble, the visible wear that signals members your equipment isn't maintained. These aren't those dumbbells. Iron Bull urethane dumbbells are built for facilities that can't afford equipment failure: solid steel core, shock-absorbent urethane encasing, precision-machined handles with medium-grade knurling, and a 7-year commercial warranty that covers the kind of daily punishment most manufacturers won't put a number on. Available in pairs or as a complete rack-ready set from 5 to 200 lb. Trusted by 100+ commercial gyms and 10,000+ customers.