Klein Tools 6-in-1 Multi-Bit Screwdriver/Nutdriver is a heavy-duty interchangeable tool designed for professionals. It features a cushion grip handle for comfort and a lifetime warranty for durability. The shaft holds 6 universal tips and converts to 3 nut driver sizes and 1 hex driver, making it versatile for a variety of tasks. The strong, durable tips are manufactured with square edges to fit screw openings securely, resisting slippage and providing positive turning action. The stronger nut driver function improves bit-holding power, even with tough applications.