FITTEST 180mm Precision Aluminium 2-way Macro Rail Slider Tripod Head Quick Release Plate Holder 1. Exquisitely CNC machined from aluminum alloy, anodized finish ensures its abrasion and corrosion resistance. 2. With macro sliding control knob, clamp sliding lock knob, clamp locking knob, two damping adjusting screws, laser engraved index markings 3. Sliding speed adjustable, you can slide slowly or you can go fast. Screw-knob with CNC cutting texture, for better grasping. 4. Standard dual dovetail groove, compatible with ARCA, RRS clamps. 5. Compact and super lightweight, easy carrying. It has longest range thanks for the compact QR plate design. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store