A pull out system, or a pull out drawer system for vehicles and trailers can be improved by an inverted French F-channel as a stationary rail; an inverted U-channel as a movable rail; and/or a cam-follower bearing being present among rollers on the rails. Also, a movable frame for a pull out drawer system can be improved by providing a support member for supporting a slide-in/out accessory, for example, a drawer or a ramp, and further by providing the accessory with such a frame.