Sevenoak Heavy-Duty Camera Slider SK-HD100 series camera sliders are designed to give you the ability to create high-quality videos without over-extending your budget. It futures with heavy-duty Aluminum construction, adjustable feet, 1/4" and 3/8" screw thread, precision bearings etc. It can be used standalone with the included feet whose height can be adjusted easily or attached directly to tripods with the built-in screw thread. With precision bearings built under the sliding plate, the camera motion is smoother and quieter than ever.