WE KNOW YOU NEED OPTIONS.Versatility is a must for organizing any socket set. Capitalize on maximum possibilities with the Socket Boss from Ernst! Individual rails can be removed or switched for customization.Add or remove socket clips, label socket sizes with I.D. stickers, trade colors, swap out drive sizes, add ratchet and extension holders; the options are limitless for organizing your own set of sockets.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.LOAD IT UP!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 1/4, 3/8, and 1/2" socket sets. Includes 57 socket clips 22 of 1/4, 18 of 3/8 and 17 of 1/2 drives w/ I.D. Stickers. 96 I.D. stickers (Metric, Standard and Torx) included for socket identification.Patents US 6,637,605, US 8,770,418, US 9,364,949, D725,993S. Made in USA.