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. Portable and secure socket storage With a simple twist your sockets are firmly secured in a locked position. Twist in the reverse direction and your sockets are free to remove. The tension is a perfect medium so you do not have to fight with your sockets to lock them into place and you don’t have to worry about them being too loose. Just a simple 1/8 turn and your tools are secured. Add, remove, and insert clips on any portion of the socket rail to fit your custom set of tools. Socket clips click into place, can be easily repositioned, installed between previously placed clips, and even work on both sides of the socket rail. End stops on each end of the socket organizer keep socket clips securely fastened. Integrated design will work with other great products from Ernst. 96 I.D. stickers are included with each organizer for easy tool identification. Simple and Secure Twist your sockets into a locked position Socket clips will adjust to any position Easy to transport Hangs vertically for convenient storage Socket Boss compatible (18) 3/8” Drive Twist Lock Socket Clips US Patents 6,637,605 and 8,770,418. Made in USA.