The Klein Tools 32593 Multi-Bit 6-in-1 Ratcheting Stubby Screwdriver, Ph, Sl provides users with a ratcheting mechanism that lets them work faster and with more efficiency. This unit includes 1/4 in. and 5/16 in. nut drivers. With its Cushion-Grip handle, the stubby interchangeable screwdriver/nut driver was designed with comfort and efficiency in mind. This unit features strong, durable tips that are manufactured to fit screw openings securely. This multi-bit screwdriver resists slippage and provides positive turning action. The strong nut driver function improves bit-holding power, even with tough applications.