The last, Dura-Pro Twist Lock clips provide all the versatility you have come to expect from Ernst, now with `` stay put '' security. This is our most varied and tough socket. With a plain your sockets are firmly secured in a locked position. Twist in the running game direction and your sockets are to remove. The tension is a undefiled so you do not have to fight with your sockets to displace them into place and you do n't have to worry about them being too insecure. Just a plain 1/8 turn and your tools are. for snug transport of your sockets as well as expedient toolbox storage., 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 and installed between previously placed clips. 15 3/8 - inch drive clips. in the USA. Lifetime. Tools not.