The Makita 3/8" x 1-3/4" ImpactX Magnetic Nut Driver (A-97667) is ideal for driving hex head nuts and self-tapping screws in a wide variety of applications. This nut driver features a lobular design that reduces the rounding of hex fasteners and allows for full contact with flanged hex head screws. ImpactX insert bits and accessories are built to meet the demands of the professional contractor. This driver features a durable, S2 steel construction with a manganese phosphate coated surface for advanced corrosion resistance.