This gift box set of 6 Grill Charms(tm) has the letters R (for Rare-1 charm) MR (for Medium Rare-2 charms), M (for medium-2 charms) and MW for Medium Well-1 charm) BEFORE you grill, you Grill Charm™ your steak or burger with the desired charm. While cooking, the grill master knows which ones have to be cooked to which temperature. When dinner comes off the grill, there is no more cutting into all the beautiful food to try to find the one you want, no more guess work, or settling for something you don't like. You simply look for your Grill Charm™.