Description of π· CAVIX All-Metal Worm Drive Macro Focus Rail Slider with Close-up Shooting Clamp Plate, 115mm Length, Adjustable with 1/4" Screw & 3/8" Thread for DSLR Camera Tripod Ballhead, Compatible with Arca RRS Lever Clamp W-160
ADJUSTABLE: The High Quality CNC Processing Macro Focusing Rail Slider Plate Precision focusing through a 115mm adjustment range, With two Control knobs is convenient to Manual regulation, Helping to achieve exacting camera-to-subject distance. PRECISE: The CAVIX Rail Slider is driven by a knob-controlled worm gear and index scales, which are printed on both sides of the rail in millimeters for consistency. DURABLE: The main part is made of aircraft-grade aluminium material, lightweight and with strong strength.CNC machining technology with edge rounded arc treatment, ensure safety to use.Hard-anodized anti-oxidation treatment with the surface, so surface smooth, corrosion and wear resistance. WIDE COMPATIBILITY: The Wormdrive Macro Focusing Rail Slider with 48mm diameter metal thumbwheel with 1/4"-20 Screw, Cameras can be mounted on top of the rail,The Base is a 38mm-wide Arca-type plate,with a 3/8 inch Bottom Screw Thread, Compatible for DSLR camera tripod, monopod Ballhead video head,etc. UNIVERSAL: The Macro Focusing Rail has Arca-style dovetail, with 1/4"-20 thread socket, It is compatible with any Arca style plate, such as RRS, Arca-Swiss, KIRK, Wimberley, Markins, Sunwayfoto, Kangrinpoche, Benro, Sirui etc.