Meco VT-1510 Tripod Action Fluid Drag Head Video Camera NOTE:before using it,twist the Tripod Action Fluid Drag Head Compatible with all DSLR(Cannon, Nikon, Sony, Samsung, Panasonic, Kodak,etc.), Camcorders, Tripods and slider rail, etc. Built-in bubble horizontal leveling indicator Sliding quick release plate with 1/4&amp;quot; screw thread&lt;br /&gt; Fluid drag system provide smooth consistent tilt and pan controls Tripod screw mount: 3/8&quot; or 1/4&quot; screw thread