We have this latch installed on the deep port side locker and the stern locker. More than a hasp, it latches firmly. Does not catch legs or lines. Requires the screw to be ground flush to the nut on the inner flange of the hatch. Can be locked when leaving the boat for extended periods. We have 3 small padlocks keyed alike. One for each locker and one for the companionway. Alternatively you can also run a line from the inside surface of the hatch to a cleat over the port q-berth. We tried this for a while. You have to lead the line down from the hatch, to a turning point (pad eye), then forward along the interior face of the cockpit side. I like the external latches better. Your experience may differ. Got ours a few years ago from www.marinepartdepot.com Bill Wickett