Duct Knife

  • Klein Tools DK06 Duct Knife: My Go-To Blade

    BySteve

    I’ve been running HVAC calls for over a decade, and I’ve gone through more duct knives than I care to count. Most either dull out after a few jobs or feel like they’re going to snap in half when you’re wrestling with dense board. The Klein Tools DK06 changed that for me. This thing cuts through flex duct like it’s not even there, and when you hit rigid board, the serrated blade actually grabs instead of sliding off. The grip doesn’t get slippery when your hands are sweaty, and at the end of a long day, my hand isn’t cramping up. I keep mine on my belt in the included sheath, and it’s held up to daily abuse for two years now. It’s not the cheapest option out there, but it’s the last duct knife I’ve had to buy.

  • Klein Tools DK16 Duct Knife: My Honest Review

    BySteve

    I’ve been running HVAC installs for over a decade, and I’ve burned through my share of duct knives. When I picked up the Klein Tools DK16, I wasn’t expecting much-just another blade to toss in my bag. But this thing surprised me. The double-edged serrated blade cuts through duct board like it’s nothing, and the fixed blade design means there’s no wobbly nonsense when you’re pushing through thick insulation. At 5-1/2 inches, it’s compact enough to not get in your way but substantial enough to handle serious work. The sheath is basic but does the job. After three months of daily use, the blade’s still sharp and the grip hasn’t loosened up. It’s not fancy, but it’s exactly what you need when you’re on your knees in a cramped attic trying to get the job done right.