21mm Socket
FailPrices span $4.88–$14.44, mostly outside the sweet spot, so 21mm Socket is a Fail.
- Flapen Score
- 45 / 100Ranks 4,788 of 7,287 Automotive niches · −4 vs the category median of 4945
- Market size
- $139K/yr123K searches / yr
- 90-day growth
- +15.4%search demand this quarter
- Competition
- 61%top-5 click share · 12 brands · 18 sellers
Flapen Score
21mm Socket against its category
The dotted line is the Automotive average. Past it, 21mm Socket is stronger. Inside it, weaker.
Market
The 21mm Socket market on Amazon at a glance
Shoppers on Amazon United States searched for 21mm Socket 123K times last year and spent an estimated $139K. The top 5 brands take 77% of clicks. Flapen scores it 45 out of 100, a Fail.
01 · Demand
An estimated 13.0% of those searches ended in a purchase.
Shoppers searched for this 123K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 13.0% of those searches ended in a purchase. Searches in the last 90 days moved +15.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $139K a year.
- Searches, last 12 months
- 123K
- Growth, 90 days vs prior 90
- +15.4%
- Conversion, latest week
- 13.0%
- Market size, estimated
- $139Ka year
- Peak month
- May1.3× the quietest month
- Top search term
- 21mm socket45K searches a year
02 · Price
A sale here is worth $8.75.
Listings sell for $8.75 on average, from $4.88 to $14.44. Amazon reports units sold in ranges. This niche sold 15K to 20K a year. The average listing sells 500 to 750 of them. At $8.75 that is $4K to $7K a year per listing.
- Average price
- $8.75under the $15 to $100 sweet spot
- Price range
- $4.88–$14.44
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 15K–20K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $4K–$7K
- Returns
- 1.8%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
68% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 4.8% of listings are out of stock. The average listing ranks #64 within Steering & Suspension Tools. It carries 2,121 reviews at 4.75 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 68%
- Prime listings
- 100%
- Out of stock, average day
- 4.8%
- Average rank
- #64in Steering & Suspension Tools
- Average rating
- 4.75 starsAmazon United States average 4.42 stars
- Average reviews
- 2,121per listing
- Listings tracked
- 19
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 53 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 53 months
Products
Top 21mm Socket products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
Sign in to see the products
The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone.
Competition
Competition: brands, sellers & click share
The top 5 products take 61% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 falling
Sellers
18
Top-5 brand share
77%
Top 20: 100%
Top-5 click share
61%
Top 20: 100%
Open market
18%
- Brand 141%
- Brand 212%
- Brand 312%
- Brand 46%
- Brand 56%
- Brand 65%
- Open — no brand owns it (6 brands, 18%)
Demand
21mm Socket search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top 21mm Socket search terms shoppers use
The exact words shoppers type, with yearly volume, growth, and conversion.
- 21mm socket45K/yr
- 21mm impact socket 1/2 drive16K/yr
- 21 mm socket 1/2 drive17K/yr
- 21mm socket 1/2 drive8K/yr
- 21 mm socket8K/yr
- 21 mm impact socket 1/2 drive4K/yr
- 21mm deep socket4K/yr
- 21mm impact socket9K/yr
- 21mm deep socket 1/2 drive5K/yr
- 21mm3K/yr
Reviews and returns
What reviews say buyers love and hate about 21mm Socket
We read the reviews and the return reasons for every product selling here.
“Broke after a couple uses”
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.
15 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 21mm Socket questions
Answered from the same tracked data.









