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. Versatility is a must for organizing any socket set. Capitalize on maximum possibilities with the Socket Boss® Storage Rail from Ernst Individual rails can be removed or switched for customization. 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. Even upside down – sockets are locked in tight Socket rails are locked in the tray for security, simply unlock with the push of a button. For 3/8" socket sets Includes 36 3/8" socket clips. 2 sheets of 96 I.D. stickers (Metric, Standard and Torx) included for socket identification Push button release to remove any rail Unlimited configuration options  Sockets are loaded with the drive end down  Instantly recognize sockets Transportable, secure & versatile Patents US 6,637,605, US 8,770,418, US 9,364,949, D725,993S