This Attwood Snap-Handle Drain Plug easily and reliably plugs drains on board. Simply insert the Drain Plug into a 1-inch-diameter drain opening and turn the handle clockwise to tighten it in place. Snap the handle to lock the plug in place. Lift the handle counter-clockwise to unlock it for easy removal. For use in 1-inch-diameter drain openings. The handle is brass and the plug is durable rubber. Attwood Corporation has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years. We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swim ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance.