The Komodo 2 Inch Spring Bar Collar - Black is specifically designed for use with 2" diameter Olympic weight lifting barbells or dumbbell bars. Its locking clamp design allows for quick and easy fitting and removal, making it efficient for any workout routine. Made of solid nylon resin with rubber inserts, this collar is incredibly secure and prevents weights from slipping off during exercise. Simply insert onto the Olympic bar and close the clamp for a secure fit, eliminating the need for twisting a pin. Increase your workout rate with this essential piece of equipment.