Like another reviewer said, it would be nice to buy individual holders or sets in the same size. None-the-less I needed a few each so I bought three sets and filled each one and still need more! I love the fact that I can keep my sockets from rolling all over the place and keep them in order according to size. That sure does reduce the time I spend looking for a particular socket!
The old ones were metal and while they worked well they did rust on me, not an issue with these.
Although this item is plastic, it looks to be very tough. It's annoying, though, that, contrary to what it says on the package, additional studs are NOT available. There are only 10 studs on the 1/4" and 3/8" racks and 8 on the 1/2" rack. I filled the 1/4" rack with a set of small deep sockets, and fully 1/2 of the rack is empty. This is a waste of space. I "chatted" with a Sears Rep and they couldn't find the studs, either.
I bought more rails to add to my expanding collection of sockets. I was expecting black rails for color, as shown, but they are an off white, with a black socket holder peg. Not a deal-breaker. Same great quality that I like, just looks a little different. I was hoping for the same color to maintain consistency of look in my organization of tooling.