Wide compatibility with a 50mm outer diameter, allowing conversion of 1" standard barbells or weight posts to 2" sizes, fitting most older style barbells, curl bars, and plate-loaded machines. Sturdy and construction ensures reliable quality, safety, and environmental protection for long-lasting performance during workouts. Easy to use; simply attach the adapter sleeve to barbells or curl bars and tighten with a wrench, with locking screws requiring a bit more force for secure fitting. Removable end caps allow for use with longer 1" standard posts, enhancing versatility in gym equipment. Hex bolt locking feature provides added security and stability for a safe exercise experience. This weight adapter sleeve is designed to enhance your workout by converting standard weight equipment to size. Its robust construction ensures durability and safety, making it a reliable addition to your gym setup. The user-friendly design allows for quick attachment and secure fitting, while the removable end caps offer flexibility for various post lengths. Enjoy a secure and efficient workout with this essential accessory. Color: Black Material: Nylon+Metal Package Contents: 2* Adapter Sleeve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.