I buy a system because I wanted to mount kit parker my synths, I ordered a box in 8U starzic not to name them, which of course never happened, then the least expensive and simpler than I found this rack is 10U * 2 roller which allows easy removal, especially qd we can place, and we must play with postion racks ... there is a set of screws to screw and nut - 10U (50% vis a rack ...), also comes with a key rack is solid foolproof, and has the advantage my eyes are the feet at the bottom of the picture ... Indeed I take this opportunity to put a wood or plance I have put power strips and power supplies .... after 2 years of use, I still have this system with no regrets! certe ca is expensive, but given the system and other models ... ca's worth it!