Proaim DSLR Shoulder Mount Rig (P-SMC) Support Pad With 15mm rail rod support handle for Video movie Film Shooting 5D MARK 2 Canon Sony Nikon Panasonic Construction Black anodized aluminum with stainless steel Rods. Shoulder pad's cover of protective aluminum with cushion foam lining. Shoulder Mount Stabilizer Handles adapt to 19mm Rods. Handles to rail mounting adapter via gear teeth. 15mm Rail System Diameter.