Features: 4 wheels slider track, can move smoothly and soundlessly. Change wheel position and axle angle to make straight slides or creative curved movements. 60cm/23.6 table dolly, sliding distance 56cm/22, with 1/4 and 3/8 screw on track. Unscrewed the retractable legs beside wheels, you can place the track on table steadily. Detachable camera platform with 1/4 screw, 3 * 1/4 screw hole, one spirit level and one fasten knob. Made of heavy-duty anodized aluminum alloy, can bear up to 6kg/13.2Lbs loads.