Details: Klein Tools Interchangeable Multi-Bit Screwdrivers Nut Drivers are heavy-duty tools designed for professionals. They are made of the highest-quality tempered steel with a torque-proof anchor in the handle. Strong, durable tips are manufactured with square edges to fit screw openings securely. They resist slippage and provide positive turning action. Stronger nut driver function improves bit-holding power, even with tough applications. Multi-bit screwdriver with high-torque ratchet for tough jobs. 6-in-1 Screwdriver has cushion grip handle for greater comfort. Heat-treated nut drivers for added strength. Contains: 3 16-Inch (5 mm) and 1 4-Inch (6 mm) slotted, #1 and #2 Phillips, 1 4-Inch (6 mm), 5 16-Inch (8 mm), and 3 8-Inch (10 mm) nut drivers, #1 and #2 square-recess, 3 8-Inch hex driver. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn t just the name of our company, it s also our family name. And since we re an American company that s family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn t just make great products, we make great products that stand up to the demands of the professionals who use them every day . Since 1857.