Klein's Flex Bit kit includes everything you need for drilling and pulling wire and cable. The flexible drill bit makes 9/16-Inch (14 mm) holes in wood. The folding placement tool helps guide the bit as you drill. The pulling grip attaches to the flexible drill bit after the hole has been made to pull wire and cable through. For work on up to 9/16-Inch (14 mm) O.D. wire. Flexible drill bit (Cat. No. 53718) made of spring steel for extreme flexibility. The screw point drill tip helps pull wire through the material as you drill. 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.