The Klein Tools radial Stripper cartridge was designed to remove the outer jacket of twisted-pair cable without damaging the conductors. Specifically for use with unshielded twisted Pair (UTP) cables. Durable high-carbon steel cutting blades are ground and honed for long life. For use with Klein's cartridge Radial strippers. Strips The outer jacket of twisted-pair cable. High-carbon steel cutting blades are ground and honed for long life. Use with Klein's dual-cartridge and Radial cartridge strippers. Color coded for easy identification. Cartridge Made from glass filled polycarbonate for superior strength and extended durability. 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.