This sturdy pair of Troy Olympic Metal Collars will keep the weights securely on olympic 2" size bars. They are made from lightweight aluminum and are unmatched in strength and durability. The impact resistant T-handle securely engage the aluminum bar-cam for maximum clamping force. The axial contact distribution minimizes damage to collars and plates. They simple and efficient design reduces moving parts to lose or break. These collars will complement the looks and quality of your equipment. Designed for all levels of lifting expertise.