A great enhancement to our PLR-814.00! Includes the traditional "key" which enables the user to turn the blades by hand, plus a hexagonal shaped key for use with a battery powered screwdriver(screwdriver not included). Simply unscrew the retainer nut from the standard butterfly key and replace with the hexagonal key and Bingo! It's ready to use with a power screwdriver. Made of the finest quality steel, this cutter will last for years. Replacement Blade is PLR-814.01.