1/8 roundover router bit 1/4 shank
Skip itBrand-locked demand (top 5 brands take 93% of clicks) — this niche doesn't clear our bar today.
Avg price
Incredible$43.40avg listing price — sweet spot $15–$100
Returns
Great1.2%return rate — above 5% kills the launch gate
Conversion
Great10.0%search→purchase rate — share of searches ending in a sale
Review moat
Good846.18avg incumbent reviews — the moat a new listing must climb
Price range
Good$9.22–$161.11cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$174K$174K/yr · 40K searches
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Growth
Bad-14.3%90-day search growth — must beat 0% to launch
Brand share
Bad93%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 1/8 roundover router bit 1/4 shank is a $174K/yr Amazon United States market (40K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Dec. Verdict: Skip it — 45/100.
Data updated Jul 30, 2026 · scored weekly · How we score niches
1/8 roundover router bit 1/4 shank market data
- Units sold / yr
- 3K–4K
- avg 100–250/product
- Revenue / yr
- $130K–$174K
- units × avg price
- Conversion rate
- 10.0%
- Avg BSR
- #78
- Page quality
- 0%
- Prime
- 94%
- Sponsored
- 94%
- Out of stock
- 1.7%
- Avg brand age
- 75 months
- Avg seller age
- 174 days
Competition & brand share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
8 falling
Sellers
53
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
4%
- Yonico60%
- Freud16%
- Whiteside Router Bits9%
- REKCKRUL4%
- Totowood4%
- MEIGGTOOL3%
- Open — no brand owns it (2 brands, 4%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -14.3% search growth over the last 90 days.Peak months: Dec · busiest ÷ quietest = 2.0×
Top 1/8 roundover router bit 1/4 shank search terms
- 1/8 roundover router bit10K/yr
- yonico router bits12K/yr
- yonico router bits 1/4 shank4K/yr
- yonico3K/yr
- yonico router bits 1/2 shank4K/yr
- 1/8 roundover router bit 1/4 shank6K/yr
Top 1/8 roundover router bit 1/4 shank 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.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
YONICO 13161q 1/8-Inch Radius Round Over Edge Forming Router Bit 1/4-Inch Shank
Yonico$9.904.6★2,325 rev
Freud Radius Rounding Over Bit with Perma-Shield Coating and Quadra-Cut Design for Flawless Finish - 2 Cutters 1/4 Shank Dia. 1/8 Radius 2-3/16 Length - 34-104
Freud$24.434.8★740 rev
YONICO Router Bits Set 15 Bit 1/2-Inch Shank 17150 Professional Carbide Tipped Roundover Cove Chamfer Bevel Dovetail Straight Flush Trim Slotting Roman Ogee fresas de Router para Madera
Yonico$49.194.5★328 rev
Whiteside 2000C Roundover Router Bit: 1/8 Inch Radius 3/4 Inch Large Diameter 1/4 Inch Shank 1/2 Inch Cutting Length
Whiteside Router Bits$27.724.9★361 rev
YONICO 70 Piece Router Bits 1/2 Shank- Tungsten Carbide Router Bit Set | Professional Wood Router Bits 17702
Yonico$161.114.6★984 rev
Newest
by launch date
REKCKRUL 4-Piece Roundover Router Bit Set - 1/4 Shank Carbide Inserts
REKCKRUL$12.7550 rev
TOTOWOOD Roundover Router Bit Set4pcs Router bit Set1/4 inch ShankRadius in 1/8 1/4 3/16 5/16Bearing Guide for Rounding Edge bit (4pcs Roundover Router Bit)
Totowood$9.22488 rev
MEIGGTOOL 2PCS Roundover Edging Router Bit Set 1/4-Inch Shank Round Nose Cutter Tools 1/8 Radius Inch
MEIGGTOOL$11.98178 rev
YONICO Router Bits Pattern Bit Flush Trim Set 4 Bit 1/2-Inch Diameter 1/4-Inch Shank 14422q
Yonico$31.931,968 rev
YONICO 13621q 6 Bit Round Over Edge Forming Router Bit 1/4-Inch Shank
Yonico$41.932,325 rev
Trending
90-day click momentumYONICO 13621q 6 Bit Round Over Edge Forming Router Bit 1/4-Inch Shank
Yonico$41.934.6★
YONICO Rabbet & Bearing Router Bit Set 1/2-Inch Height with 6 Bearings 1/4-Inch Shank 14705q
Yonico$30.764.6★
REKCKRUL 4-Piece Roundover Router Bit Set - 1/4 Shank Carbide Inserts
REKCKRUL$12.754.1★
YONICO 13161q 1/8-Inch Radius Round Over Edge Forming Router Bit 1/4-Inch Shank
Yonico$9.904.6★
YONICO Router Bits Set 15 Bit 1/2-Inch Shank 17150 Professional Carbide Tipped Roundover Cove Chamfer Bevel Dovetail Straight Flush Trim Slotting Roman Ogee fresas de Router para Madera
Yonico$49.194.5★
What buyers say about 1/8 roundover router bit 1/4 shank
What buyers praise and complain about, mined from review topics.What buyers love
“Great item fir my shop”
“It's definitely worth the price”
“As advertised as expected”
“are very sharp for cutting”
“Easy to use”
“Excellent fit”
“the bits cut alright”
“Heavy and well ballance and carbide cutters last a long long time”
What buyers complain about
“broke with the first pass”
“Cheap”
“They are not the sharpest”
“Small bit”
“Could probably buy a cheaper bit”
“Had to replace it”
“First the bearings inner race are very sloppy”
“wobble when using”
“I was not able to find the screw”
Top return reasons
Common questions
- Is 1/8 roundover router bit 1/4 shank profitable to sell on Amazon United States?
- The niche generates $174K/yr across 17 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -14.3%. Flapen's verdict: Skip it (45/100).
- How competitive is the 1/8 roundover router bit 1/4 shank niche?
- 8 brands and 53 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in 1/8 roundover router bit 1/4 shank?
- Top complaints mined from reviews: Durability, Quality-Overall, Sharpness. The return rate is 1.2%.
- When does demand for 1/8 roundover router bit 1/4 shank peak?
- Demand peaks in Dec; the busiest month runs 2.0× the quietest.
- What does it cost to enter the 1/8 roundover router bit 1/4 shank niche?
- Listings span $9.22–$161.11; the average listing price is $43.40 (sweet spot $15–$100). The average incumbent carries 846 reviews — the moat a new listing must climb.