LEM Products Heavy-Duty Burger Press - Heavy-duty, non-stick burger press can be adjusted to any thickness from 1/4in to 1in. Makes a large 4-3/8in diameter patty. Burger press makes perfect, uniform burgers every time. Adjust the patty thickness by loosen the locking wing nut, turn the adjustment screw in or out until the desired thickness is reached, and tighten the locking wing nut. Heavy duty aluminum Non-stick Adjustable 1/4in to 1in patties Hand wash and dry Use with the LEM Freezer Sheets to keep your fresh patties from sticking together