The CAP Olympic Rubber Competition Bumper Plates with Steel Inserts are competition quality and are color-coded by size. Use these high-end plates to practice at home, with the same quality you'll find in competitions. This CAP bumper plate offers protection for both the bar and the bumper plates with its sound construction. Steel hubs reinforce the holes and protect the bar at the same time. These plates can only be used with 2 in Olympic bars.