Titan 38097 3/8 inch Drive SAE Magnetic Aluminum Socket Rail features a 3/8 inch drive with an SAE magnetic anodized socket holder. It holds 14 sockets and universal joints. It accepts standard and deep sockets. The sizes marked on the rails for easy identification. The sizes include: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1. It has a u-joint anodized aluminum rail construction. It has a super strong magnet for solid placement.