---
title: "21mm Wrench — $88K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/21mm-wrench"
last_updated: "2026-08-08T09:36:38.253Z"
locale: en
meta:
description: "Niche score 49/100 · $88K/yr market · 54K searches/yr · $13.70 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $88K/yr market · 54K searches/yr · $13.70 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "21mm Wrench — $88K/yr Amazon US Niche (2026) - Flapen"
---
# **21mm wrench**
**Skip it**
Strong incumbent ratings (4.7★) — this niche doesn't clear our bar today.
Market size 22Growth 24Conversion 95Competition 42Returns 83Price range 75Avg price 64Brand share 63Review moat 56Quality gap 18
**Conversion**
**Incredible****12.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Great****1.6%**
return rate — above 5% kills the launch gate
**Price range**
**Great****$6.17–$41.02**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Good****$13.70**
avg listing price — sweet spot $15–$100
**Brand share**
**Good****67%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Good****1,278.1**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****60%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-1.3%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$88K**
$88K/yr · 54K searches
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, 21mm wrench is a $88K/yr Amazon United States market (54K searches/yr). The top 5 brands hold 67% of demand. Verdict: Skip it — 49/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **21mm wrench market data**
- **Units sold / yr**
- **6K–8K**
- avg 250–500/product
- **Revenue / yr**
- **$82K–$110K**
- units × avg price
- **Conversion rate**
- **12.0%**
- **Avg BSR**
- **#63**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **70%**
- **Out of stock**
- **4.2%**
- **Avg brand age**
- **59 months**
- **Avg seller age**
- **150 days**
## **Competition & brand share**
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▼falling
**Sellers**
**38**
**Top-5 brand share**
**67%**
Top 20: 100%
**Top-5 click share**
**60%**
Top 20: 100%
**Open market**
**28%**
- FLZOSPER20% - DURATECH17% - Egofine14% - SORAKO10% - TEKTON7% - TOOLGUARDS5%
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — -1.3% search growth over the last 90 days.
2K1KSpike '24Black Friday '24Spike '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/21mm-wrench/trend)
## **Top 21mm wrench 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.
0%10%$9K20%$18K30%$27K40%$35K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**FLZOSPER 21mm Metric Wrench 12-Point Box End Head Combination Wrench Spanner**FLZOSPER**$6.91**4.8★620 rev](https://www.amazon.com/dp/B0C5XHSKF1) [2**Egofine 21mm Ratcheting Combination Wrench Metric Industrial Grade Gear Spanner with 12-Point Design 72-Tooth Ratchet Chrome Vanadium Steel**Egofine**$9.93**4.5★53 rev](https://www.amazon.com/dp/B0B3HSMDYK) [3**DURATECH 21mm Combination Wrench Metric**DURATECH**$9.73**4.6★68 rev](https://www.amazon.com/dp/B0CNTM3SY5) [4**SORAKO 21mm Ratcheting Combination Wrench Chrome Vanadium Steel Gear Wrench Industrial Grade Cr-V Steel Gear Spanner Household Garage Tools(Metric)**SORAKO**$6.94**4.6★95 rev](https://www.amazon.com/dp/B0CG5CPLF6) [5**TEKTON 21 mm Combination Wrench | 18292**TEKTON**$11.35**4.8★5,844 rev](https://www.amazon.com/dp/B00Q01OK9A)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**DURATECH 21mm Extra Long Ratcheting Wrench Double Box End**DURATECH**$19.12**264 rev10mo ago](https://www.amazon.com/dp/B0FQ93XQYK) [**COYAGRIP 21mm Wrench Industrial Grade Spanner Combination Wrenches Metric with 12-Point Box End 15-Degree Offset 21mm Wrenches Chrome Vanadium Steel Mirror Polished**COYAGRIP**$9.48**260 rev1y ago](https://www.amazon.com/dp/B0FC5Z9VXR) [**Egofine 21mm Ratchet Wrench Flex Head Ratcheting Combination Wrench Metric Industrial Grade Gear Spanner with 12 Point Box End 72-Teeth Ratchet Chrome Vanadium Steel**Egofine**$13.78**691 rev1y ago](https://www.amazon.com/dp/B0F1YFWBFJ) [**Hordion 21mm Metric Combination Wrench Spanner with Box End and Open End**Hordion**$6.17**60 rev1y ago](https://www.amazon.com/dp/B0DXDSM277) [**PHITUODA 21mm Metric Combination Wrench**PHITUODA**$6.46**64 rev2y ago](https://www.amazon.com/dp/B0D81S6VYR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**GEARWRENCH GearBox 12 Pt. XL Flex Head Double Box Ratcheting Wrench 21mm - 86021 Black**GEARWRENCH**$41.02**4.7★**▲ 157%**](https://www.amazon.com/dp/B06XCJVCLR) [**SORAKO 21mm Ratcheting Combination Wrench Chrome Vanadium Steel Gear Wrench Industrial Grade Cr-V Steel Gear Spanner Household Garage Tools(Metric)**SORAKO**$6.94**4.6★**▲ 157%**](https://www.amazon.com/dp/B0CG5CPLF6) [**DURATECH 21mm Extra Long Ratcheting Wrench Double Box End**DURATECH**$19.12**4.8★**▲ 87%**](https://www.amazon.com/dp/B0FQ93XQYK) [**Hordion 21mm Metric Combination Wrench Spanner with Box End and Open End**Hordion**$6.17**4.7★**▲ 26%**](https://www.amazon.com/dp/B0DXDSM277) [**COYAGRIP 21mm Wrench Industrial Grade Spanner Combination Wrenches Metric with 12-Point Box End 15-Degree Offset 21mm Wrenches Chrome Vanadium Steel Mirror Polished**COYAGRIP**$9.48**4.7★**▲ 25%**](https://www.amazon.com/dp/B0FC5Z9VXR)
**~~View all trending →~~**
## **What buyers say about 21mm wrench**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**37%
*“Fair price”*
**Quality-Overall**24%
*“Appears to be well made”*
**Size-Overall**11%
*“fits well”*
**Advertised Vs Actual Product**6%
*“came as described”*
**Add-Ons/Attachments**3%
*“Excellent add on wrench to a set previously bought”*
**Thickness**3%
*“theyre thin they are a good buy”*
**Strength**3%
*“Solid and works as expected”*
**Weight Heavy**3%
*“Heavy duty”*
**Functionality-Overall**3%
*“Helped get the job done”*
**Comfort-Overall**2%
*“Although I haven't needed to use it yet I am more comfortable to have it”*
### **What buyers complain about **
**Quality-Overall**23%
*“Not a quality tool”*
**Durability**18%
*“Used once and broke”*
**Advertised Vs Actual Product**18%
*“Misleading Advertising”*
**Functionality-Overall**14%
*“Needed this tool so bad for my truck parts”*
**Ease Of Use**9%
*“I couldn't use it”*
**Size-Overall**9%
*“it would not fit in the tight spot i needed it to be”*
**Thickness**2%
*“Not thick like some”*
### **Top return reasons **
**Size-Overall**45%
**Mechanism Issues**12%
**Advertised Vs Actual Product**7%
**Value For Money**7%
**Quality-Overall**7%
**Functionality-Overall**5%
**Defective Material/Parts**5%
**Thickness**3%
**Product Condition**2%
**Material Quality**1%
## **Common questions**
- **Is 21mm wrench profitable to sell on Amazon United States?**
- The niche generates $88K/yr across 20 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -1.3%. Flapen's verdict: Skip it (49/100).
- **How competitive is the 21mm wrench niche?**
- 17 brands and 38 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 67% of demand.
- **What do buyers complain about in 21mm wrench?**
- Top complaints mined from reviews: Quality-Overall, Durability, Advertised Vs Actual Product. The return rate is 1.6%.
- **When does demand for 21mm wrench peak?**
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- **What does it cost to enter the 21mm wrench niche?**
- Listings span $6.17–$41.02; the average listing price is $13.70 (sweet spot $15–$100). The average incumbent carries 1,278 reviews — the moat a new listing must climb.
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