Our Socket Rail Clips are interchangeable for rail customizations based on your socket storage needs. Our Socket Rails work with all chrome and impact sockets and are offered in 1/4″, 3/8, and drive. Removeable end caps make the rail adjustments easy. The MILWAUKEE Rail Clip 10 Packs are available in 1/4 drive (49-66-6739), 3/8 drive (49-66-6740), and 1/2 drive (49-66-6741).