The Camlock Clamps attach to the back of the Plastiform Board with a twist and thern slide up and down the board to the desired location. They are then clamped onto the 3/4" round pin stakes to set the form board's desired height. Also fits wood, rebar and other stakes 5/8" or 7/8" sizes.
Recommended to use every 2.5 - 3 ft. on curved section or 3 - 4 ft. on a straight section.
Sold by the individual piece. Consider ordering 4-5 clamps per 12 ft. board or 3-4 per 8 ft. board.