Be very careful with those spring type hatch arms. If your arm or hand accidentally touches it, it bends the spring and the hatch, or whatever is held up, will come crashing down. I added a type of arm that you open the hatch all the way, a latch locks in place, and the arm stays open. To close, you lift the hatch all the way open, the retaining latch disengages, then you close the hatch. It's rigid with a telescoping movement. I have one on the refridgerator door and one on the cover for the engine compartment. I bought them from Catalina Parts (Florida, Walter Pandy I think was his name), because I saw this on the refridgerator on one of the larger Catalina boats a the show several years ago. I think they were about $12 each.