Sweet. Thanks for the link. It looks like the only difference is they are not magnetic.
Edit: I noticed they sell the magnetized ones for $16.90
I found another rack with a different 'twist.' You put the socket on and it automatically locks. You have to turn it to remove the socket.
http://www.socketlockit.com/
The Socket Lockits are interesting, but a bit pricey. They seem ideal for someone that would be moving their sockets to and from jobs without having to deal with them falling off like other types of rails. The Ernst still seem to be the most flexible option I've see though.

