The Klein 32527 11-in-1 Screwdriver/Nut Driver is great for HVAC and other industrial applications and includes a unique style bit for installation/removal of common TR-4 Schrader valves and aggressive thread extractor tip for backing out broken cores. The Cushion-Grip handle allows for greater torque and comfort. Patented Tip-Ident quickly identifies the type of screwdriver and screwdriver tip orientation. Premium chrome plated for smooth feel and corrosion resistance. Special heat-treated shafts increase durability and life. Internal flanges inside handle provide solid, twist-resistant blade anchor. The 32527 features a precision-machined tip for exact fit and blast finish bit tips that provide a firm hold and reduce cam out. This 11-in-1 screwdriver/ nut driver contains 3/16-Inch and 1/4-Inch slotted heads, 1 and 2 Phillips heads, 1/4-Inch, 5/16-Inch and 3/8-Inch nut drivers, 1 and 2 square heads, core removal/installation and core extractor. Meets or exceeds applicable ASME / ANSI specifications. Since 1857, Klein Tools has manufactured the world"s finest hand tools. Today, Klein Tools is the 1 choice among professional tradesmen. We manufacture more than 3,000 tools and accessories, including pliers, cable and bolt cutters, wire strippers, voice-data-video tools and testers, fish tapes, conduit benders, drill bits, insulated tools, gloves and many other high-quality products. Klein Tools" dedication to quality and innovation continues with products available for professional tradesmen worldwide.