The ultimate clip, 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 versatile and rugged socket clip. 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. Ideal for secure transport of your sockets as well as convenient toolbox storage. 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 and installed between previously placed clips. Includes 15 3/8-inch drive clips. Made in the USA. Lifetime guarantee. Tools not included.