Is ken onion work sharp belts profitable to sell on Amazon United States?

The niche generates $81K/yr across 8 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +4.4%. Flapen's verdict: Skip it (41/100).

How competitive is the ken onion work sharp belts niche?

2 brands and 8 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in ken onion work sharp belts?

Top complaints mined from reviews: Value For Money, Sharpness, Durability. The return rate is 1.0%.

When does demand for ken onion work sharp belts peak?

Demand peaks in Jan–Apr–May; the busiest month runs 4.0× the quietest.

What does it cost to enter the ken onion work sharp belts niche?

Listings span $19.40–$59.31; the average listing price is $26.93 (sweet spot $15–$100). The average incumbent carries 3,412 reviews — the moat a new listing must climb.

ken onion work sharp belts

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible12.3%

search→purchase rate — share of searches ending in a sale

Avg price

Incredible$26.93

avg listing price — sweet spot $15–$100

Price range

Incredible$19.40–$59.31

cheapest to priciest tracked listing — scored on the share inside $15–$100

Returns

Great1.0%

return rate — above 5% kills the launch gate

Growth

Okay+4.4%

90-day search growth — must beat 0% to launch

Review moat

Okay3,412.38

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$81K

$81K/yr · 24K searches

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad90%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, ken onion work sharp belts is a $81K/yr Amazon United States market (24K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Apr–May. Verdict: Skip it — 41/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

ken onion work sharp belts market data

Units sold / yr: 3K–3K; avg 250–500/product
Revenue / yr: $67K–$81K; units × avg price
Conversion rate: 12.3%
Avg BSR: #159
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 66 months
Avg seller age: 186 days

Competition & brand share

The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.

Brands

2 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

90%

Top 20: 100%

Open market

WORK SHARP67%
MOVIRON33%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +4.4% search growth over the last 90 days.

Peak months: Jan, Apr, May · busiest ÷ quietest = 4.0×

Open Trend

Top ken onion work sharp belts products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Work Sharp WSSAKO81113 Assorted Belt Kit Replacement for Ken Onion Edition

WORK SHARP$19.814.8★6,445 rev

45 Pcs 3/4 X 12 Replacement Knife Sharpener Sanding Belt Kit for Work Sharp Knife & Tool Sharpener Ken Onion Edition (WSKTS-KO) 80/120/240/400/600/800/1000/2500/5000 Grits

MOVIRON$20.004.7★47 rev

Work Sharp WSSAKO81115 Replacement Belt Kit for Ken Onion Blade Grinder Attachment

WORK SHARP$22.634.7★811 rev

45 Pcs 3/4 x 12 Replacement Knife Sharpener Sanding Belt Kit for Work Sharp Knife & Tool Sharpener Ken Onion Edition (WSKTS-KO) 80/120/240/400/600/800/1000/2500/5000 Grits

MOVIRON$19.884.6★914 rev

Work Sharp Bulk Bundle Value Pack Ken Onion Replacement Abrasive Belt Kit 21 Assorted Grits

WORK SHARP$59.314.8★6,445 rev

Newest

by launch date

45 Pcs 3/4 X 12 Replacement Knife Sharpener Sanding Belt Kit for Work Sharp Knife & Tool Sharpener Ken Onion Edition (WSKTS-KO) 80/120/240/400/600/800/1000/2500/5000 Grits

MOVIRON$20.0047 rev

7mo ago

45 Pcs 1/2 x 12 Replacement Sharpening Belt Kit for Official Work Sharp Knife & Tool Sharpener (WSKTS & WSKTS-KT/Mk.1 & Mk.2) - Assorted Grits (80/120/240/400/600/800/1000/2500/5000)

MOVIRON$19.40184 rev

10mo ago

Work Sharp Bulk Bundle Value Pack Ken Onion Replacement Abrasive Belt Kit 21 Assorted Grits

WORK SHARP$59.316,445 rev

1y ago

Work Sharp Bulk Bundle Value Pack KTS Replacement Abrasive Belt Kit 24 Assorted Grits

WORK SHARP$34.7011,896 rev

1y ago

45 Pcs 3/4 x 12 Replacement Knife Sharpener Sanding Belt Kit for Work Sharp Knife & Tool Sharpener Ken Onion Edition (WSKTS-KO) 80/120/240/400/600/800/1000/2500/5000 Grits

MOVIRON$19.88914 rev

3y ago

What buyers say about ken onion work sharp belts

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall24%

“Good Quality”

Sharpness19%

“Easy to Keep Your knives sharp”

Value For Money17%

“Great value”

Size-Overall14%

“They fit”

Advertised Vs Actual Product13%

“Works as advertised”

Durability4%

“very durable”

Ease Of Use2%

“Easy to use”

Comfort-Overall1%

“They are so much more comfortable than those alligator type clips”

Material Quality1%

“Quality of materials”

Locally Manufactured1%

“We love Made in America, dont we”

What buyers complain about

Value For Money19%

“Sort of costly for what they are”

Sharpness18%

“they always break before even 1 knife is sharpened”

Durability17%

“they always break before even 1 knife is sharpened”

Quality-Overall12%

“they cheap”

Size-Overall12%

“Belts seem good just not well marked for grit size”

Product Condition8%

“Came through as described slightly used. not all belts”

Rusts/Corrodes3%

“some badly rusted metal objects”

Top return reasons

Size-Overall63%

Advertised Vs Actual Product15%

Sharpness7%

Compatibility-Overall4%

Value For Money2%

Product Condition2%

Quality-Overall1%

Defective Material/Parts1%

Functionality-Overall1%

Thickness1%

Common questions

Is ken onion work sharp belts profitable to sell on Amazon United States?: The niche generates $81K/yr across 8 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +4.4%. Flapen's verdict: Skip it (41/100).
How competitive is the ken onion work sharp belts niche?: 2 brands and 8 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in ken onion work sharp belts?: Top complaints mined from reviews: Value For Money, Sharpness, Durability. The return rate is 1.0%.
When does demand for ken onion work sharp belts peak?: Demand peaks in Jan–Apr–May; the busiest month runs 4.0× the quietest.
What does it cost to enter the ken onion work sharp belts niche?: Listings span $19.40–$59.31; the average listing price is $26.93 (sweet spot $15–$100). The average incumbent carries 3,412 reviews — the moat a new listing must climb.