Designed by Bay Area legend, Chef Bruce Hill, The Chef's press is a vented and weight adjustable tool to create the perfect sear on all sorts of foods, and allowing for foods to cook 20-30% faster. They stack together for more or less weight or for more surface area. Made from a solid piece of stainless steel. Made in Oakland, California. If you are getting only one, we suggest the 13oz, but we strongly suggest getting one of each to cover all the bases!