---
title: "Multiple Locks with Same Key — $79K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/multiple-locks-with-same-key"
last_updated: "2026-08-07T01:21:12.570Z"
locale: en
meta:
description: "Niche score 50/100 · $79K/yr market · 36K searches/yr · $33.39 avg price. A small market ($79K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $79K/yr market · 36K searches/yr · $33.39 avg price. A small market ($79K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Multiple Locks with Same Key — $79K/yr Amazon US Niche (2026) - Flapen"
---
# **multiple locks with same key**
**Worth a look**
Shows a sweet-spot price point ($33.39 avg), but a small market ($79K/yr) keeps it on the watch list.
Market size 20Growth 30Conversion 71Competition 82Returns 49Price range 67Avg price 95Brand share 41Review moat 41Quality gap 45
**Avg price**
**Incredible****$33.39**
avg listing price — sweet spot $15–$100
**Competition**
**Great****33%**
top-5 click share — an open shelf
**Conversion**
**Good****6.5%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****$6.99–$133.91**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Okay****3.1%**
return rate — above 5% kills the launch gate
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****80%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****2,364**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+4.2%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$79K**
$79K/yr · 36K searches
According to Flapen's Amazon United States niche tracking, multiple locks with same key is a $79K/yr Amazon United States market (36K searches/yr). The top 5 brands hold 80% of demand. Demand peaks in Aug–Oct. Verdict: Worth a look — 50/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **multiple locks with same key market data**
- **Units sold / yr**
- **3K–3K**
- avg 0–100/product
- **Revenue / yr**
- **$83K–$100K**
- units × avg price
- **Conversion rate**
- **6.5%**
- **Avg BSR**
- **#103**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **81%**
- **Out of stock**
- **1.8%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **158 days**
## **Competition & brand share**
Clicks spread well past the top 5 (33% combined) — an open shelf where new products get seen.
**Brands**
**20 **▲rising
**Sellers**
**96**
**Top-5 brand share**
**80%**
Top 20: 100%
**Top-5 click share**
**33%**
Top 20: 68%
**Open market**
**17%**
- Master Lock56% - SafiSwords9% - Puroma7% - CINCINNO5% - SEPOX4% - XanHen3% - Open — no brand owns it (14 brands, 17%)
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — +4.2% search growth over the last 90 days.
2K2KPrime Day '25Spike '25 seasonDecMarJunAugNovMarMay
Peak months: Aug, Oct · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/multiple-locks-with-same-key/trend)
## **Top multiple locks with same key search terms**
- **4 locks with same key**8K/yr+1.8%6.7% conv. - **master lock keyed alike**7K/yr+29.5%3.0% conv. - **3 locks with same key**7K/yr+4.5%8.0% conv. - **master lock 4 pack**8K/yr-2.5%6.3% conv. - **6 locks with same key**3K/yr+10.8%6.1% conv. - **pad locks with same key 6 pack**3K/yr-27.1%4.7% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/multiple-locks-with-same-key/search-terms)
## **Top multiple locks with same key 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%3%$2K6%$5K9%$7K12%$9K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Master Lock Black Key Lock Heavy Duty Weather Resistant Padlock with Cover Keyed Alike Padlocks for Outdoor Use 4 Pack M115XQLF**Master Lock**$37.04**4.6★12,340 rev](https://www.amazon.com/dp/B00FK8U8MM) [2**Master Lock Black Outdoor Key Lock Standard Weather Resistant Padlock with Cover Keyed Alike Padlocks for Lockers Fences Sheds or Other Equipment 4 Pack 131Q**Master Lock**$20.12**4.6★6,713 rev](https://www.amazon.com/dp/B00004Y8D4) [3**SafiSwords Waterproof Padlocks Keyed Alike for Outdoor use Covered Heavy Duty Laminated Steel Lock 1-9/16 Inch. Wide Long Padlock Pack of 6**SafiSwords**$29.45**4.4★1,446 rev](https://www.amazon.com/dp/B091B353VC) [4**Master Lock Black Magnum Keyed-Alike Padlocks with All-Weather Cover Outdoor Lock for Fence or Gate with a 1-7/8 Inch Lock Body and 1-1/2 Inch Shackle 3-Pack**Master Lock**$27.75**4.6★12,340 rev](https://www.amazon.com/dp/B000WEMG5G) [5**Puroma 4 Pack Keyed Padlock with 6 Keys Alike 1.1 Inch Locker Lock 40mm Heavy-Duty Locks for Gate Fence Hasp Cabinet Toolbox School Gym Locker (Black)**Puroma**$17.10**4.6★4,391 rev](https://www.amazon.com/dp/B0BF9XFD4R)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**3 Pack Outdoor Waterproof Padlocks with Key 1.5 Keyed Alike**ZEERSHEE**$15.10**147 rev1y ago](https://www.amazon.com/dp/B0DQJB8XMN) [**SEPOX Trinity Keyed-Alike Padlocks Outdoor Reinforced Laminated Steel Body Heavy-Duty 1-9/16 40MM Uncuttable Standard Shackle 3-Pcs-Lock 6-Pcs Same Keys for Gym Locker Toolbox Shed Storage**SEPOX**$13.50**288 rev2y ago](https://www.amazon.com/dp/B0CPY9CN2Q) [**Lock Outdoor Padlocks Key Lock Padlocks with Same Key - Laminated Steel Keyed Padlocks with Long Shackle 6 Pack for Hasp Latch Sheds Fences Storage Locker School Gym**XanHen**$20.71**242 rev2y ago](https://www.amazon.com/dp/B0CJR9V1CD) [**SafiSwords 8-Pack Keyed Alike Laminated Steel Padlocks Keys 1-3/4 Wide Heavy Duty Long Pad Lock Set with Same Keys**SafiSwords**$31.35**258 rev3y ago](https://www.amazon.com/dp/B0C3J7SGSY) [**Puroma 4 Pack Keyed Padlock with 6 Keys Alike 1.1 Inch Locker Lock 40mm Heavy-Duty Locks for Gate Fence Hasp Cabinet Toolbox School Gym Locker (Black)**Puroma**$17.10**4,391 rev3y ago](https://www.amazon.com/dp/B0BF9XFD4R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Master Lock - (10) Keyed Alike Locks w/ 20 Keys 3NKALF-10 w/BumpStop Technologiy**Master Lock**$118.23**4.6★**▲ 158%**](https://www.amazon.com/dp/B09H97C9SX) [**SafiSwords 8-Pack Keyed Alike Laminated Steel Padlocks Keys 1-3/4 Wide Heavy Duty Long Pad Lock Set with Same Keys**SafiSwords**$31.35**4.3★**▲ 72%**](https://www.amazon.com/dp/B0C3J7SGSY) [**Master Lock - (6) Keyed Alike Locks w/ 12 Keys 3NKALF-6 w/BumpStop Technologiy**Master Lock**$75.64**4.6★**▲ 61%**](https://www.amazon.com/dp/B09CN4QMMB) [**Lock Outdoor Padlocks Key Lock Padlocks with Same Key - Laminated Steel Keyed Padlocks with Long Shackle 6 Pack for Hasp Latch Sheds Fences Storage Locker School Gym**XanHen**$20.71**4.6★**▲ 59%**](https://www.amazon.com/dp/B0CJR9V1CD) [**SEPOX Trinity Keyed-Alike Padlocks Outdoor Reinforced Laminated Steel Body Heavy-Duty 1-9/16 40MM Uncuttable Standard Shackle 3-Pcs-Lock 6-Pcs Same Keys for Gym Locker Toolbox Shed Storage**SEPOX**$13.50**4.6★**▲ 52%**](https://www.amazon.com/dp/B0CPY9CN2Q)
**~~View all trending →~~**
## **What buyers say about multiple locks with same key**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Locking Mechanism**37%
*“Great Pad Locks”*
**Quality-Overall**14%
*“Excellent product”*
**Value For Money**13%
*“Excellent price”*
**Advertised Vs Actual Product**6%
*“Exactly as described”*
**Size-Overall**4%
*“Fit well”*
**Strength**4%
*“Super heavy duty locks”*
**Durability**3%
*“well made and durable”*
**Security**3%
*“Solid and Secure”*
**Ease Of Use**2%
*“Easy to use”*
**Efficiency**1%
*“Works great”*
### **What buyers complain about **
**Locking Mechanism**19%
*“they would not lock”*
**Rusts/Corrodes**16%
*“are completely rusted”*
**Quality-Overall**9%
*“Not quality”*
**Durability**8%
*“Had it for two weeks”*
**Size-Overall**8%
*“Too small”*
**Value For Money**5%
*“I see why they are cheap”*
**Ease Of Use**4%
*“Terrible to use”*
**Advertised Vs Actual Product**3%
*“Not as described”*
**Water Resistance**3%
*“However, as some reviews have stated, the waterproof cap does not work well”*
**Strength**3%
*“They seem to be pretty flimsy”*
### **Top return reasons **
**Size-Overall**61%
**Locking Mechanism**14%
**Advertised Vs Actual Product**6%
**Value For Money**3%
**Functionality-Overall**3%
**Quality-Overall**2%
**Defective Material/Parts**2%
**Weight Heavy**2%
**Thickness**1%
**Compatibility-Overall**1%
## **Common questions**
- **Is multiple locks with same key profitable to sell on Amazon United States?**
- The niche generates $79K/yr across 62 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +4.2%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the multiple locks with same key niche?**
- 20 brands and 96 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 80% of demand.
- **What do buyers complain about in multiple locks with same key?**
- Top complaints mined from reviews: Locking Mechanism, Rusts/Corrodes, Quality-Overall. The return rate is 3.1%.
- **When does demand for multiple locks with same key peak?**
- Demand peaks in Aug–Oct; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the multiple locks with same key niche?**
- Listings span $6.99–$133.91; the average listing price is $33.39 (sweet spot $15–$100). The average incumbent carries 2,364 reviews — the moat a new listing must climb.
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