My Go-To Duct Knife: Klein Tools DK06 Review
I’ve been cutting flex duct and duct board for over a decade, and a bad knife will absolutely wreck your day. The Klein Tools DK06 is not a bad knife – far from it. First time I pulled it out of the sheath, I could tell this thing meant business. The serrated stainless steel blade chews through flexible duct like it’s nothing, and the handle sits in your hand like it belongs there. No slipping, no fighting the material, just clean cuts every time. The included sheath keeps it protected on your belt without getting in the way. Klein built this for guys actually working in the field, not just browsing tool catalogs. If you’re in HVAC or sheet metal and you’re still wrestling with a utility knife, do yourself a favor – grab the DK06.








