Attach the BigBite Auto Patty Maker to your grinder and watch the patty form through the clear top of the attachment. When the patty well is full, slide the tray over and the patty falls out onto your patty paper, while a second patty starts to form in the adjacent patty well. Makes 4″ patties 3/4″ thick. BPA Free. Fits # 8, # 12, # 22 and # 32 size grinders. Auto patty maker has an all-poly construction which makes clean up a breeze. Use LEM Freezer Sheets to keep frozen patties from sticking together.