The Kamerar 23 Camera Slider is an accessory that makes your film shooting tasks incredibly easy. It features threaded mounting holes that measure 1/4"-20 and 3/8"-16. The black linear rail and the red slider carrier with a bubble leveler are completely anodized. This camera slider features Compound Friction Bearings that are essential for silent tracking while shooting movie scenes. You can conveniently adjust the camera slider’s feet for proper leveling on uneven surfaces. With its simple construction and impressive practicality, you can never go wrong with the Kamerar 23 Camera Slider.