The Super Mag Rail Slider is a lightweight macro stage for very precise 4-way camera alignment, made from Magnesium alloy. It moves forward, back, left & right, making it ideal for precise close-up work, tilting or macro-photography. MF-screw driver is attached to detach the bottom screw adapter. After detaching the adapter screw, it allowes installing a 3/8 inch screw. Light weight, & smooth action for adjusting the macro photo focus, the Super Mag Slider weighs only one pound, & allows 2.5 top maximum movement.