The Inspection Hatches with Detachable Cover are made of highly resistant plastic for extra resistance to the sun, water, salt and detergents containing acetone. They have no hinges, so that you can completely remove the cover. It’s easy to open, since the specially designed thread automatically ejects the cover, once you turn it 90° anticlockwise. Even more, they feature a non-skid surface and hidden screws for smarter appearance.