Sizzix-Big Shot Plus Accessory Magnetic Platform. For perfect registration, the Sizzix Magnetic Platform uses high-grade magnets to hold Thinlits, Framelits and other chemically-etched, wafer-thin dies securely in place during cutting. This makes them instantly compatible with the Big Shot Plus and Big Shot Pro machines (sold separately). The diagrams on the Magnetic Platform and its tabs offer easy guidelines about how to make the perfect Sizzix sandwich. This package contains one 15x9x.625 inch magnetic platform.