With 22,000 cutting strokes per minute, the Equalizer® Ninja cuts into the urethane at an astonishing rate of 367 times a second. Ninja's unique design gives you the ability to cut at a 90 degree angle for easy control under hoods, trunk lids and visors. Includes one 1-inch blade (1-1/2-inch [PWR5150] and 3/4-inch [PWR5152] blades also available, sold separately)