The Benro MoveOver4 35.4" Aluminum Rail Slider is an entry-level option for shooters who want to add cinematic, linear motion to their productions. Supporting up to 8.8 pounds, the carriage glides along a single 1.8" wide aluminum rail with two stainless steel embedded rods for smooth, quiet operation. A fixed 3/8"-16 screw on the carriage is provided for attaching an optional flat base tripod head. A cheese plate on the underside of the rail makes it easy to center-mount the slider, providing multiple threaded 1/4"-20 and 3/8"-16 holes. You can easily adjust and level your slider with the removable and articulating rubber feet. To assist with leveling on uneven terrain, there is a bubble level integrated into the carriage.