Vaper 36097 1/4 inch Drive SAE Magnetic Aluminum Socket Rail features a 1/4 inch drive with an SAE magnetic anodized socket holder. It holds 12 sockets, adapters, and universal joints. It accepts standard and deep sockets. The sizes are marked on rails for easy identification. The sizes include: 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2. It has an adapter with u-joint anodized aluminum rail construction. It has a super strong magnet for solid placement.