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🔪 Cut smarter, not harder — the last duct knife you'll ever need!
The Malco DK6S is a professional-grade duct knife featuring a 6-inch double-edged cutlery steel blade with one serrated and one smooth edge, designed for precision cutting of flexible fiberglass wool duct and duct board. It boasts an ergonomic rubberized cushioned grip for comfort, a puncture-resistant nylon sheath with belt loop and Velcro strap for safety, and is fully resharpenable to maintain peak performance. Trusted by pros, it’s ambidextrous and built for durability and versatility on the job.
































| ASIN | B001943YPE |
| Age Range Description | limited time |
| Best Sellers Rank | #24,150 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #32 in Knife Blades |
| Blade Edge | Plain, Serrated |
| Blade Length | 6 Inches |
| Blade Material | Alloy Steel |
| Blade Shape | Straight |
| Brand Name | Malco |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,167) |
| Global Trade Identification Number | 00686046531175 |
| Hand Orientation | Ambidextrous |
| Handle Material | Rubber |
| Included Components | Punture Resistant Nylon Sheath |
| Item Length | 10 Inches |
| Item Type Name | Malco DK6S Double-Sided Smooth and Serrated Duct Knife |
| Item Weight | 2.4 ounces |
| Manufacturer | Malco |
| Model Name | Malco DK6S Double-Sided Smooth and Serrated Duct Knife |
| Model Number | DK6S |
| Power Source | Hand Powered |
| Recommended Uses For Product | Cuts flexible-fiberglass wool, duct board |
| Reusability | Reusable |
| Special Features | Puncture Resistant Nylon Sheath. Serrated Edge. Double edged, cutlery grade steel blades. |
| Style | Knife |
| UPC | 686046531175 |
| Unit Count | 1.0 Count |
| Warranty Description | Limited |
R**D
Best Ever
Best ever knife! best I ever got off Amazon! and I have bought alot! that kinife is super sharp the serrated blade is the sharpest I ever had out of the box. It's not just for cutting batton it will cut almost anything! If I had to have only one knife for any and everything including some of those pricey EDC one's this is it.
O**N
Great Quality
Excellent knife, stays on my tool belt
P**D
Works as a Hori knife
Got this as a less expensive and more durable alternative to the trendy Hori Hori knives used in gardening. Use for cutting turf, slicing roots, weeding, splitting perennial clumps, planting bulbs, cutting ties and wire and other garden tasks. Works great in that application. Whenever I go out into the garden I have this strapped on.
J**Y
Very sharp
Perfect for what I'm gonna do with it I'm gonna use it as a metal detecting knife. Great value, I think it'll last me a while. Sharp enough to cut through most things.
D**N
👍
Excelente producto
C**E
Great knife/cheaply made sheath
Great knife for a good price. Cuts through flex duct with ease and easy to sharpen. Most guys I work with use klein which is heavier and does not hold an edge as well. However Malco could take a lesson from Klenk or even Milwaukee and provide a better sheath. Mine is basically nothing but duct tape at this point.
A**M
Union sheet metal worker, use this daily
Great quality construction, comfortable handle, both blades are super sharp! The ball bearing in the handle is odd, but weirdly comfortable when handling, who knew?! I use this to cut duct liner, flex duct, and have used it to cut weather insulation (duct wrap) as well. Works great and stays sharp. The belt loop on the sheath does fit through a 3” tool belt so that’s a huge plus! Overall great product! I was hesitant at first to get this knife, because why do I need it? I have plenty other knives that work just fine. Get this knife! I wish I would’ve gotten it sooner!
J**A
Muy bueno
Trustpilot
3 weeks ago
2 months ago