BAIER COMMERCIAL HATCH. Galvanized steel hatch and ring. 15" x 24" oval hatch with hex center-bolt. Two dog Strongback design. Opens from outside with supplied Hex wrench. Welded grab handles built in to the cover. No snag points for nets or lines. Opens from inside with integral handle. Stongback allows for adjustable clamping pressure; infinitely adjustable to provide a better water tight seal. ABS Approved. Easily repairable - complete set of spare parts available.