This fully padded 3.5” waist belt allows you to “rotate or lock” Modular, Skin, and Multimedia components for even weight distribution HALF WAY around the belt on special rails. Especially designed for use with lots of gear and the Pixel Racing Harness (sold separately). Modular, Skin, and Multimedia components can “Rotate” or “Lock” on the Steroid Speed Belt. This is a tremendous advantage is have this type of functionality. Most photographers "Rotate" the bags on the belt, preferring not to lock them into position. To "Rotate", put the plastic tongue behind the belt, then firmly attached the bag. This allows the bag to be pushed along the belt to the desired position. To "Lock", put the plastic tongue in the horizontal webbing slot.