Easily add on sockets, ratchets, and extentions to Ernst socket rails. Clips snap into place and can adjust position for customisation. 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. Made in USA.