The Star Lock Olympic Collars are crafted with superior durability for top tier performance. These collars are sold in pairs and will fit all Olympic barbell sleeves. They sport a heavy duty plastic frame that is durable and lightweight. The Star Lock collars deliver on practicality by creating a secure hold on the bar even with numerous, high-impact drops as experienced in all CrossFit workouts. The collars are designed to allow easy and simple adjustments or removal with a simple lever and lock and unlock mechanism. Pick up a set for yourself today and don’t forget to tell your fellow workout friends about this top seller!