Heavy-duty, non-stick burger press can be adjusted to any thickness from 1/4" to 1". Makes a large 4 3/8" 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. Use LEM Freezer Sheets when making your burgers for easy separation after freezing.