I don't know where this tool has been all my life. That's great. It took me less than 6 minutes to put out the flaming barrel. Made the top and bottom of a sealed 55 gallon metal drum. Works on the same principle as the can opener on a Boy Scout pocket knife. Haven't tried it on a plastic keg, but that's the closest thing. won't work on the bottom as they have rounded corners and don't have a "edge" like metal drums. Good product!