UPGRADE QUALITY: Made from heavy duty and high quality nylon, To withstand up to 600 pounds of weight. Provides you with long-lasting performance and security.PERFECT LENGTH: The 8-inch length can fit most older style barbells, curl bars and plate loaded weight machines. End cap is REMOVABLE for use with longer 1" standard posts!EASILY SECURED: This Olympic adapter socket has a hex bolt locking feature,increase its safety. Includes 2 allen key, please still refrain from overtightening.FITS OLYMPIC WEIGHT PLATES: Olympic 8" Adapter Sleeve - 2Pcs ,Converts 1" Standard barbell to 2" Olympic barbell bar. Includes 2 allen key.WE OFFER YOU 100% MONEY BACK GUARANTEE, If by any reason you are not satisfied with your product just return it and we will refund your money, no questions asked.Fidelity, Quality and Honesty are our core values. We beleive in long term relationships that is why we want you to be confident in your buying decision. Fits on 1 Inch Barbells Barrel Adapter Sleeve