great for OCD wiring
Crutchfield Customer Review (What's this?)
I bought two of these to connect six speaker zones in my house, with three zones on A and three zones on B. If I change my mind about which room should be on A or B, it's easy to pull the plug from one block and connect it to the other block. The previous homeowner used wire nuts to connect up to four speaker wires together, and the cabinet was a mess. I cleaned it up with these connecting blocks and also sorted out some mis-wiring along the way.
Pros: good connections, clear labels