The Makita 2-3/8" ImpactX Magnetic Insert Bit Holder (A-96936) is ideal for driving screws in a variety of heavy duty applications including metal fastening, deck building, framing, and installing plywood subfloor. ImpactX insert bits and accessories are built to meet the demands of the professional contractor. The durable, heat treated hex shaft is constructed of S2 performance optimized steel for extended life and is coated in manganese phosphate for advanced corrosion resistance.