The Klein DK06 Serrated Duct Knife cuts duct board and flexible duct. This 5 1/2- Inch double-edged knife has a regular and serrated blade. The cushion-grip handle creates comfort and control. The DK06 includes a puncture resistant nylon sheath with belt loop for convenience. 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.