Here is the complete system for the DSLR or video camera owner, consisting of: Shoulder Mount, Follow Focus and Matte Box. The aim of this kit is to provide the operator maximum flexibility while shooting both outdoors and indoors. It is a very portable and handy kit. Features: Completely gear driven design for slip-free and accurate movement. Adjustable locking system. Flexible designed, easily adjust into different shooting mode. Handgrips and shoulder with pad provide comfort long period shooting. 1/4" female adapter at bottom Lens Max support up to 77mm. Made of durable anodized black metal and ABS. Gear drive can be mounted from either side (works for both right-handed and left-handed). Mounts onto 15 mm Rod Support (60mm center to center difference). Compatible with all DSLR cameras, DV. Compatible with industry standard 15 mm Rods. Specifications: Material: Aluminum, ABS, Rubber Fit Rail Dia: 15mm Rails c-to-c distancet: 60mm Gear Nylon and ABS Dial Index Adjustment: 360degree Screws thread: 1/4" Package Contents: 1x Rail Rod System for Follow Focus Brackets 1x Should Pad 3x Support Rod 1x SLR Cameras DV Follow Focus 1x Matte Box