Odd parts from a kayak pro shop hoard. These are assumed to be Hurricane Seat Brackets for unknown year and model of kayak. This is a set, right and left side brackets. The screw hole space is 6 15/16 inches on center for the shorter side of the bracket and 6.5 inches inches on center for the longer side (with cut-out) of the bracket. Overall length is 8.5 inches. HURROUT