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. Easily add on sockets, ratchets, and extentions to Ernst socket rails. Clips snap into place and can adjust position for customization. Ratchets and extensions are conveniently stored with sockets on one holder. Twist lock clips keep sockets secure. Includes 1/4”, 3/8” and 1/2” Face Mount Ratchet & Extension Holders and 15 each of Twist Lock 1/4”, 3/8” and 1/2” Socket Clips. 2 sheets of 96 I.D. stickers (Metric, Standard and Torx) included for socket identification. Black Easily add extra tools to socket rails Sockets are secure – even when turned upside down    Instantly recognize sockets   Organize ratchets and extensions with socket sets   Patent US 8,770,418