VILTROX V2-370 Camera Track Dolly Slider Video Stabilizer 1/4'' and 3/8'' for Camera DSLR Camcorder 740mm Travel On Tripod, 370mm Travel On Ground; Load capacity up to 8kg aircraft-grade aluminum alloy heat treatment High precision ball bearing 100% aluminum precision CNC processing Bottom with 1/4" and 3/8" can be installed on the tripod, for the good stabilization and safety, recommend the distance between the points that the tripods legs contacts the ground should be 80cm or more 1/4" male thread screw for all kinds of professional camcorders, SLR cameras, DSLR and DVs, including a 1/4" to 3/8" Adapter, so can be installed ballhead for different angle recording