This Maestrini deck filler key has 3 different shaped and sized keys. It will open the majority of common marine deck fillers (petrol filler cap, diesel filler cap, water filler cap, pump out cap, rinse filler cap etc.).
-Hexagon: Allen key with an edge distance of 16 mm.
-Slot: Rectangular slot (dimensions 30 x 5 x 4 mm).
