Ernst Manufacturing products are 100% made in the USA. They supply innovative, high quality storage products to some of the leading names in the tool industry. There are multiple possibilities with the Socket Boss® Storage Rail from Ernst. Individual rails can be removed or switched for customisation. Add or remove socket clips, label socket sizes with I.D. stickers, trade colours, swap out drive sizes, add ratchet and extension holders. Perfect for storage in the drawer, on the bench, or on the go. This compact set fits a large set of tools using a small amount of storage space. Easy to grab and go with handles on each end. Twist-Lock clips keep sockets secured for transport and prevent tool loss. Add Ernst socket accessories for your own custom set. Socket rails are locked in the tray for security, simply unlock with the push of a button. High Visibility For 3/8" socket sets 13" version includes 28 socket clips Comes with I.D. Stickers. 192 I.D. stickers included for socket identification Push button release to remove any rail  Unlimited configuration options  Sockets are secure – even when turned upside down   Sockets are loaded with the drive end down  Instantly recognize sockets  Transportable , secure and versatile Patents US 6,637,605, US 8,770,418, US 9,364,949, D725,993S