Capitalize on maximum configuration possibilities for organizing any socket set with the Socket Boss Universal Twist-Lock Socket Tray from Ernst Manufacturing. The full length of this 19-inch rail can be loaded with sockets, and 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. Even upside down sockets are locked in tight. Socket rails are locked in the tray for security and unlock with the push of a button. Ernst recommends red for SAE and blue for Metric. This package includes: one socket tray, three universal socket rails and 57 twist lock socket clips (22 clips each for 1/4-inch, 18 clips for 3/8-inch and 17 clips for 1/2-inch drive sockets). Made in USA. Measures 19.75 by 5.3 by 1.35 inches. Patents US 6,637,605, US 8,770,418, US 9,364,949, D725,993S