Duct Knife
FailThe top 5 products take 83% of clicks, so Duct Knife is a Fail.
- Flapen Score
- 46 / 100Ranks 5,399 of 9,536 Tools & Home Improvement niches · −2 vs the category median of 4846
- Market size
- $150K/yr82K searches / yr
- 90-day growth
- -0.8%search demand this quarter
- Competition
- 83%top-5 click share · 8 brands · 43 sellers
Flapen Score
Duct Knife against its category
The dotted line is the Tools & Home Improvement average. Past it, Duct Knife is stronger. Inside it, weaker.
Market
The Duct Knife market on Amazon at a glance
Shoppers on Amazon United States searched for Duct Knife 82K times last year and spent an estimated $150K. The top 5 brands take 89% of clicks. Flapen scores it 46 out of 100, a Fail.
01 · Demand
8.7% of searches ended in a purchase last week.
Shoppers searched for this 82K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. In the latest week, 8.7% of those searches ended in a purchase. Searches in the last 90 days moved -0.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $150K a year.
- Searches, last 12 months
- 82K
- Growth, 90 days vs prior 90
- -0.8%
- Conversion, latest week
- 8.7%
- Market size, estimated
- $150Ka year
- Peak month
- February1.4× the quietest month
- Top search term
- duct knife48K searches a year
02 · Price
A sale here is worth $21.01.
Listings sell for $21.01 on average, from $13.62 to $40.00. Amazon reports units sold in ranges. This niche sold 5K to 6K a year. The average listing sells 250 to 500 of them. At $21.01 that is $5K to $11K a year per listing.
- Average price
- $21.01inside the $15 to $100 sweet spot
- Price range
- $13.62–$40.00
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 5K–6K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $5K–$11K
- Returns
- 0.5%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
33% of listings pay for placement with sponsored ads. 89% ship with Prime. On an average day, 2.6% of listings are out of stock. The average listing ranks #348 within Knives, Parts & Accessories. It carries 512 reviews at 4.66 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 33%
- Prime listings
- 89%
- Out of stock, average day
- 2.6%
- Average rank
- #348in Knives, Parts & Accessories
- Average rating
- 4.66 starsAmazon United States average 4.42 stars
- Average reviews
- 512per listing
- Listings tracked
- 9
04 · Newcomers
Amazon counts 1 of last year's 2 launches as successful.
2 products launched here in the last 12 months. Amazon counts 1 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 62 months on average, so the names here are established.
- Launched, last 12 months
- 2
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 62 months
Products
Top Duct Knife products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
Top sellers
by 90-day click share
KLEIN TOOLS DK16 Double-Edged Duct Knife Serrated Stainless Steel Blade Designed for Duct Board and Insulation Fixed Blade Knife with Sheath 5-1/2-Inch
- Price
- $20.05
- Rating
- 4.8/5
- Reviews
- 114
- Age
- 9mo ago

Klein Tools DK06 Knife Serrated Stainless Steel Duct Knife for Flexible Duct and Board with Sheath
- Price
- $17.61
- Rating
- 4.7/5
- Reviews
- 1,833
- Age
- 16y ago

Malco DK6S Double-Sided Smooth and Serrated Duct Knife with Sheath For Cutting Flexible Duct and Ductboard Ergonomic Cushion Grip Resharpenable Cutlery Grade Steel Blades
- Price
- $17.64
- Rating
- 4.7/5
- Reviews
- 1,202
- Age
- 18y ago

MIDWEST Flex Duct Knife 5 Blade - MWT-FDK01
- Price
- $19.07
- Rating
- 4.6/5
- Reviews
- 362
- Age
- 8y ago

WORKPRO 8-Inch Insulation Knife Stainless Steel Blade Insulation Cutter
- Price
- $13.62
- Rating
- 4.5/5
- Reviews
- 53
- Age
- 9mo ago
Trending
90-day click momentum
WORKPRO 8-Inch Insulation Knife Stainless Steel Blade Insulation Cutter
- Price
- $13.62
- Rating
- 4.5/5
- Reviews
- 53
- Age
- 9mo ago

KLEIN TOOLS DK16 Double-Edged Duct Knife Serrated Stainless Steel Blade Designed for Duct Board and Insulation Fixed Blade Knife with Sheath 5-1/2-Inch
- Price
- $20.05
- Rating
- 4.8/5
- Reviews
- 114
- Age
- 9mo ago

Hilmor 1891331 SMTDK Duct Knife - HVAC Sharp Duct Tool Stainless Steel
- Price
- $22.20
- Rating
- 4.6/5
- Reviews
- 181
- Age
- 11y ago

PINOZE 8 Insulation Knife Stainless Steel Blade Insulation Cutter w/Laser Scale Dual-Side Serrated Duct Knife Tool with Sheath for Cutting Heat Material Foam/Rockwool/Styrofoam Garden Sod Cutter
- Price
- $14.58
- Rating
- 4.6/5
- Reviews
- 180
- Age
- 1y ago

DA71000 KLENK TOOLS Dual Duct / Insulation Knife - Rosewood Handle
- Price
- $24.37
- Rating
- 4.7/5
- Reviews
- 408
- Age
- 19y ago
Newest
by launch date
KLEIN TOOLS DK16 Double-Edged Duct Knife Serrated Stainless Steel Blade Designed for Duct Board and Insulation Fixed Blade Knife with Sheath 5-1/2-Inch
- Price
- $20.05
- Rating
- 4.8/5
- Reviews
- 114
- Age
- 9mo ago

WORKPRO 8-Inch Insulation Knife Stainless Steel Blade Insulation Cutter
- Price
- $13.62
- Rating
- 4.5/5
- Reviews
- 53
- Age
- 9mo ago

PINOZE 8 Insulation Knife Stainless Steel Blade Insulation Cutter w/Laser Scale Dual-Side Serrated Duct Knife Tool with Sheath for Cutting Heat Material Foam/Rockwool/Styrofoam Garden Sod Cutter
- Price
- $14.58
- Rating
- 4.6/5
- Reviews
- 180
- Age
- 1y ago

MIDWEST Flex Duct Knife 5 Blade - MWT-FDK01
- Price
- $19.07
- Rating
- 4.6/5
- Reviews
- 362
- Age
- 8y ago

Milwaukee 48-22-1920 Duct Knife
- Price
- $40.00
- Rating
- 4.7/5
- Reviews
- 271
- Age
- 10y ago
Competition
Competition: brands, sellers & click share
The top 5 products take 83% of clicks. A locked shelf that new listings rarely crack.
Brands
8 falling
Sellers
43
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
83%
Top 20: 100%
Open market
7%
- KLEIN TOOLS56%
- Malco13%
- Midwest Snips7%
- WORKPRO7%
- Milwaukee6%
- KLENK4%
- Open — no brand owns it (2 brands, 7%)
Demand
Duct Knife search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Duct Knife search terms shoppers use
The exact words shoppers type, with yearly volume, growth, and conversion.
- duct knife48K/yr
- duct knife hvac18K/yr
- milwaukee duct knife9K/yr
- hvac knife4K/yr
- klein duct knife3K/yr
Reviews and returns
What reviews say buyers love and hate about Duct Knife
We read the reviews and the return reasons for every product selling here.
“because it's so dull”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
18 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Duct Knife questions
Answered from the same tracked data.









