ITEM SPECIFICATIONS:Each rail holds 8-9 sockets. The clips have spring loaded ball bearings to firmly hold sockets in place, even upside down.
MULTI Drive : 1/4 Inch, 3/8-Inch and 1/2-Inch Drive Socket Organizer Rails
INTERCHANGEABLE: Patented ball bearing clips glide over the aluminum rail. If you want to put a couple 1/4" Sockets on your 1/2" rail, you can. Clips will fit on any of the rails allowing you to mis-match your sets as you please.
Quick and easy way to organize your tool box or mount to wall or workbench
Why do you need these: Does this sound familiar “I put them in a tool box for when I am working at a site and if I go to pull one out usually 3 sockets just randomly fall off. Within a few minutes I have 6 sockets rolling around all out of order which is the whole point of these.” Forget the hassles of the cheap rails where the clips fall off, then the sockets, and finally you cut your hand on sharp edges. Stop digging through all your sockets to find the right size.