Utility 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 FLICKBLADE Review: My Go-To HVAC Utility Knife

    ByMike Izzo

    I’ve been running HVAC calls for over a decade, and I’ve burned through more utility knives than I care to count. Most either fall apart after a few weeks or end up buried in my van somewhere when I need them most. The Klein FLICKBLADE changed that for me. This isn’t just another knife with “HVAC” slapped on the box—it’s actually designed for how we work. The folding design means it’s not ripping up my pockets, the built-in scraper handles gasket removal without me fumbling for another tool, and those dual locking positions let me dial in the blade extension I need. Klein included three triple-ground blades that stay sharp through insulation, tape, and cardboard. After six months of daily abuse, it’s still my first grab from the toolbag.