SF3D Mercenary Forces Reference Card BinderWhat do you do with all those data cards that come in most Maschinen Krieger kits? Put 'em in a binder. Designed to hold those roughly A5 sized data cards, this particular binder dates from the days when Maschinen Krieger was called SF3D Original (we're guessing early to mid '80s). This particular binder comes with some data cards already included, but there's still room left to add your own.