This is an optional XRAY Aluminum Shock Spring Retaining Collar Set, and is intended for use with the XRAY T1, T2 and T3 vehicles. These aluminum CNC-machined shock collars can be used on the XRAY shock absorbers to increase the durability. These stylish and lightweight collars are CNC-machined from premium Swiss 7075 T6 aluminum and are strategically lightened.