M18 Press Tool 1/2 in. - 2 in. Black Iron Press Tool Jaw Set For Viega MegaPress FittingsBlack Iron Press Jaws and Rings were designed for use on Viega MegaPress Fittings and provide a faster alternative to threading and roll grooving to connect 1 2 in. 1 in. Schedule 5 40 Black Iron Pipe. Milwaukees Rings have a unique dual pivot design which provides superior close quarter access and are up to 30% lighter than the leading competitor. Milwaukee Black Iron Press Jaws and Rings provide exceptional access and superior productivity when used