High quality Stainless Steel and marine grade Aluminum trolling plate. The plate can be folded down with a remote cable and it brakes the propeller flow decreasing the boat speed for a perfect fish trolling (it is used at minimum RPM). Once the trolling is concluded, the plate can be raised and it becomes a flap (lower consumption, better stability and cruising speed). It is mounted on the underside of the anti-cavitation plate, with engines above 200HP it must go on top. It can be adjusted in 3 positions for enhanced speed control.Plate 4724001 for engines from 25 to 50 HP and plate 4724002 for engines with higher power. Warning: Do not give full throttle with the flap down or it could suffer damage.