YUELIVES Olympic Weightlifting Barbell Bar, made of Q235 steel solid rod, hard chrome-plated, designed for Olympic standard 2-inch dumbbells. 2 hard chrome-plated spring collars are given as a gift to firmly fix the weight plates to prevent slipping. 4 high-quality needle roller bearings and diamond knurl, protect the wrist while increasing friction, especially when lifting heavy weights, make the bar more suitable for the advanced players and competition trainers.