Neewer DSLR Rig Set Movie Kit Film Making System, include Shoulder Mount Follow Focus Matte Box and C-shaped Bracket for All DSLR Cameras and Video Camcorders Gear Nylon and ABS Dial Index Adjustment: 36 Gear drive can be mounted from either side (works for both right-handed and left-handed). 1/4" female adapter at bottom Lens Max support up to 77mm. Compatible with all DSLR cameras, DV. Compatible with industry standard 15 mm Rods.