Klein Tools insulated screwdrivers are designed for precision work, and feature interchangeable blade locks for optimum control. Made of the highest quality tempered steel, carefully heat-treated for maximum strength, and precision milled to fit screw openings securely. Rotating caps and Klein's exclusive Cushion-Grip handles offer outstanding comfort and control. Insulated barrel with 1000V insulation that includes two double-ended bits that exceed ANSI and ASTM standards. 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.