TWIST Mount EVF Kit for Sony Venice Viewfinder Wedge (DVF-EL200)TWIST Mount EVF Kit with Knuckle and Sony Venice Viewfinder Wedge (DVF EL200) Includes the NATO rail, Knuckle, and Sony Venice Viewfinder Wedge Spud, which can attach to a sideways 15mm rod clamp like the optional items Multi Function Rod Bracket (MFRB 15mm LW) or Single 15mm Rod Clamp (M4 x 20mm)(sold separately). The NATO rail has built in variable friction via the thumbscrew, and safety pins are on each end to prevent accidental accessory removal.