The 4-Way Macro Focusing Rail Slider is made of premium aluminum alloy, allowing it to be lightweight yet strong enough to support up to 3kg. It features a metal slide with accurate transmission for long-lasting use. The double ruler allows for precise adjustments, supporting lateral movement of 5cm and longitudinal movement of 10cm. This slider can be easily mounted on a tripod and is compatible with all professional SLR cameras. The adjustable locking device and 1/4 inch screw hole make it easy to use and perfect for capturing close-up shots. The package includes the Macro Focusing Rail Slider and it weighs approximately 662g. It is designed for photographers looking to achieve precise and smooth camera movements for macro photography.