1/4'' Apex® power drive nutsetter, magnetic, 6 point square opening. Magnetic nutsetters from Apex® Fastener Tools formally Cooper Tools, are built to hold the fastener in driving position, even when working straight down. Time-wasting motions are eliminated when starting fasteners or working in hard-to-reach areas. These nutsetters are identified with a M prefix. Hex drive nutsetters from Apex® Fastener Tools formally Cooper Tools, allow nutrunning in all types of applications. Nutsetters from Apex® Fastener Tools feature a durable design and are constructed for a long service life. With Apex® you are assured of an exact, sure fit. All nutsetters from Apex® Fastener Tools have the tightest tolerances for straightness and concentricity in the industry.