Rack Mount Mixer Stand features upper platform with 2 crossbars to place different sizes of mixers; Bottom rackmount with 2 crossbars & holes to hold amplifier stable With 4 rolling casters for easy movement, 2 of them are lockable Upper platform's angle can be adjusted for easier visibility; With 48 7/16' to 54 15/16' height adjustable range to fit your height With metal construction for durability & long lifespan Applied as a universal electronic device rack stand for using with sound equipment