Features and Benefits Tool is counter-balanced for smooth operation which results in less fatigue to the body Heavier and thicker blades last much longerBuilt-in air regulator 12,000 strokes per minute allows you to cut through urethane much fasterComes with 4î, 6î and 8î bladesSafety lever - 1 year warrantyReplacement blades available:17701 - 4î ....(more info)