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🔪 Cut sharp, work smart — the only knife your toolkit will ever crave!
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 ducts and duct board. It includes an ergonomic rubberized grip for comfort, a puncture-resistant nylon sheath with belt loop and Velcro strap for secure carry, and resharpenable blades for lasting performance. Highly rated by pros for versatility and durability, it’s the ultimate tool for tradespeople and DIYers alike.














































| ASIN | B001943YPE |
| Age Range (Description) | limited time |
| Age Range Description | limited time |
| Best Sellers Rank | #66,735 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #87 in Knife Blades |
| Blade Edge | Plain, Serrated |
| Blade Length | 6 inches |
| Blade Material | Alloy Steel |
| Blade Shape | Straight |
| Blade Type | Double-edged |
| Brand | Malco |
| Brand Name | Malco |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.7 out of 5 stars 1,210 Reviews |
| Global Trade Identification Number | 00686046531175 |
| Hand Orientation | Ambidextrous |
| Handle Material | Rubber |
| Included Components | Storage Case |
| 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 |
| Number of Items | 1 |
| Part Number | DK6S |
| Power Source | Hand Powered |
| Recommended Uses For Product | Cuts flexible-fiberglass wool, duct board |
| Reusability | Reusable |
| Size | 6" |
| Special Feature | Puncture Resistant Nylon Sheath. Serrated Edge. Double edged, cutlery grade steel blades. |
| Special Features | Puncture Resistant Nylon Sheath. Serrated Edge. Double edged, cutlery grade steel blades. |
| Style | Knife |
| UPC | 686046531175 |
| Unit Count | 1 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.
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.
S**E
Great
As good as it gets. Great for cutting flex duct or any type of insulation. Durable light weight and sharp
A**G
Sharp
Same quality as the other two I bought years back really sharp be careful
R**N
Good value for the price
For the price, this knife does the job pretty well. It doesn’t have the same overall quality or feel as some higher-end insulation knives like Milwaukee, but it definitely gets the work done. The steel actually feels decent and holds up better than I expected. It cuts well and has been useful for everyday work tasks. If you're expecting premium quality, this may not be it, but as a work knife at this price point, it’s a solid option and gets the job done.
J**T
Very handy
I knew I needed this knife for cutting ducts, but it has saved my can more than a few times in the HVAC field. There’s also a hole that you can pass through your belt loop so it’s always by your side.
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
B**L
looks like you could use it for bear hunting too
It's a very solid duct knife, looks like you could use it for bear hunting too! Great quality
E**R
Malco duct knife.
Buen cortador de ductos. La funda es de Nylon nada resistente. Bueno para tareas de corte no difíciles.
O**V
As good as it gets
Good quality and price comparing to the similar products in stores.
P**N
Ok
It Is ok but dont imagine getting à knife for your collection, steel Is so so
A**R
so-so
Knife design is ok. The jagged edge is effective, the straight edge is well sharpened, This is not a full tang knife. Handle is hard plastic and is very slippery. Not a great deal. I will not buy again. After 3 weeks of use, the rubber on the handle is peeling off. There are far better alternatives.
Trustpilot
2 months ago
1 week ago