Klein has the nut drivers professionals demand to get the job done. The full hollow shaft facilitates work on stacked circuit boards or other long bolt applications. Premium chrome-plated for smooth feel and corrosion resistance. The handle end is color coded for easy identification. The patented Tip-Ident quickly identifies nut driver and size. 4-Inch hollow shaft works well on long bolts and studs. 5/8-Inch hex driver is premium chrome-plated to resist corrosion. Tempered steel driver has yellow color-coded cushion grip handle. Meets or exceeds applicable ASME / ANSI specifications. Handle end is also color coded for easy identification. Cushion-Grip handle allows for greater torque and comfort. Tip-Ident quickly identifies nut driver and size. 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.