The famed Plopper Tool from Kees van der Westen's Espressionistic Works B.V.
Used to remove and install a group screen in any 58mm lever machine without having to load it up with sugar, burn your fingers, or damage your screen. Simply drop it in your portafilter basket in the correct direction (removal or installation) lock your portafilter on, and you're good to go. Instructions are included.
Works in all lever machines with a 58mm portafilter basket.