Opteka CXS-100 Dual Rig Kit with Shoulder Support, FF180 Reversible Follow Focus and MB360 Digital Matte Box for Digital SLR and Video Cameras Dramatically improves your comfort and shot quality, stabilizes your video and reduces rotation Universal 15mm rail system Heavy-duty aluminum and stainless steel construction Camera and tripod screw threads: " Opteka CXS-100 dual handle rig, FF180 follow focus and MB360 matte box included