The Commercial Panini Grill Press also known as a Sandwich Grill Press is unique in that the Panini Press has a lower and upper heated platen or grill surface that cooks both sides at one time.   Panini presses can have numerous gill surface options.  The grill can be a grooved or flat surface in both top and bottom platen surfaces or a combination thereof.  Grooved surfaces score the bread with charred marks giving the sandwich added eye appeal and more of a crunchy surface that most people desire.  A Panini Press can have cast iron, aluminum, and glass surfaces.  Manufacturers that are offered are: Axis, Cadco, Equipex, Sirman, Star, and Waring.