Dante Products Combo Pack with Straight 1/2-Inch, Quarter-Turn Ball Valve with Chrome Floor Plate and 3-inch Key Dante Combo Pack Straight , Quarter Turn Ball Valve, 3 Chrome Floor Plate (with  threads) and 3 Chrome Key (fits  & 5/16 sockets) Material (Key & Floor Plate)-Zinc Die Cast; Chrome Plated Cleanliness-Heats chimney quickly causing fireplace to draw smoke immediately up the chimney, never into the room Convenience-NEW Design Installs in minutes and is easy to use Savings-features an energy conserving air/gas mixing chamber for efficient operation