This is an aluminum socket holder with a luxurious feel. The clip rotates 360°, making it easy to check the size and model number of the clips are the same size, so you can change the insertion angle for easy identification of sockets with different rail colors depending on the insertion angle (6.3sq. : red, 9.5sq. : blue, 12.7sq. black) Insertion angle: 9.5 mm, No. of sockets: 10 mm, Total length: 10 mm, aluminum