90-tooth gear delivers a 4° swing arc to turn a fastener in tight confines; Teardrop, low-profile head and flush-mounted on/off switch allow better access in tight spaces; Enclosed head design for extreme resistance to dirt infiltration; Precision engineered high strength pawl for increased durability; Highly visible on/off markings on the head; Bright, full polish chrome finish easily wipes clean and resists corrosion; Meets or exceeds ASME specifications