---
title: "Door Knob Lock Cover — $35K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/door-knob-lock-cover"
last_updated: "2026-08-09T00:27:55.588Z"
locale: en
meta:
description: "Niche score 41/100 · $35K/yr market · 38K searches/yr · $16.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · $35K/yr market · 38K searches/yr · $16.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Door Knob Lock Cover — $35K/yr Amazon US Niche (2026) - Flapen"
---
# **door knob lock cover**
**Skip it**
A small market ($35K/yr) — this niche doesn't clear our bar today.
Market size 9Growth 42Conversion 63Competition 25Returns 41Price range 58Avg price 79Brand share 28Review moat 25Quality gap 80
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Great****$16.54**
avg listing price — sweet spot $15–$100
**Conversion**
**Good****5.6%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****$5.38–$28.55**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+13.2%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****3.8%**
return rate — above 5% kills the launch gate
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****70%**
top-5 click share — a locked-up shelf
**Review moat**
**Bad****4,407.43**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$35K**
$35K/yr · 38K searches
According to Flapen's Amazon United States niche tracking, door knob lock cover is a $35K/yr Amazon United States market (38K searches/yr). The top 5 brands hold 88% of demand. Verdict: Skip it — 41/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **door knob lock cover market data**
- **Units sold / yr**
- **3K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$41K–$50K**
- units × avg price
- **Conversion rate**
- **5.6%**
- **Avg BSR**
- **#174**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **79%**
- **Out of stock**
- **4.4%**
- **Avg brand age**
- **45 months**
- **Avg seller age**
- **182 days**
## **Competition & brand share**
The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▼falling
**Sellers**
**22**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**70%**
Top 20: 100%
**Open market**
**7%**
- PRIME-LINE40% - PILISPARK23% - PUGED12% - yingranlock8% - AST6% - PKLIYH5% - Open — no brand owns it (3 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 86 weeks — +13.2% search growth over the last 90 days.
900700Spike '25 seasonDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/door-knob-lock-cover/trend)
## **Top door knob lock cover search terms**
- **door knob lockout device**12K/yr+49.6%5.0% conv. - **door knob lock cover**16K/yr-17.0%3.9% conv. - **door knob cover lock**6K/yr+15.4%5.5% conv. - **doorknob lockout device**4K/yr+41.9%4.9% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/door-knob-lock-cover/search-terms)
## **Top door knob lock cover 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%$3K20%$7K30%$10K40%$14K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Prime-Line S 4180 Door Knob Lock-Out Device Gray Single Pack**PRIME-LINE**$13.85**4.2★3,522 rev](https://www.amazon.com/dp/B00BOZBDK6) [2**PILISPARK Child Proof Door Knob Cover Lock Prevents Turning of Door Knob and Access to Keyhole Can be Used for Home Rentals Evictions Job Sites & More Keyed Alike (Black)**PILISPARK**$14.51**4.2★153 rev](https://www.amazon.com/dp/B0DZ6BWDQ6) [3**PUGED Door Knob Lockout Device Cover to Disable Doorknob/Faucet/Water Valve Hose Door Handle Temporary Lock for Bedroom Door from Outside Lock Door Handle Without Drilling**PUGED**$17.77**4.2★127 rev](https://www.amazon.com/dp/B0CNXC19MQ) [4**Door Knob Lock Combination Child Proof Door Knob Cover Lock Out Device for Bedroom Bathroom Faucet Water Gas Valve Temporary Door Handle Lock Prevents Access to Keyhole Dementia Elderly**yingranlock**$18.42**4.2★167 rev](https://www.amazon.com/dp/B0CY4724LQ) [5**PILISPARK Door Knob Lock Out Device with Padlock Door Handle Lock - Prevents Turning Door Handles and Entering Keyholes for Covering Door Handles/Faucets/Valves Stainless Steel (Black)**PILISPARK**$17.38**4.5★288 rev](https://www.amazon.com/dp/B0CL5XBKY5)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**AST Door Knob Lockout Device with 3 Keys Childproof Door Knob Covers Lock Out to Smart Doorknob. Safety Cover for Faucet Valve Spigot. Prevent Access to Keyhole Matte Silver with Brass Keys**AST**$28.20**116 rev7mo ago](https://www.amazon.com/dp/B0G3NGJJTG) [**AST Door Knob Lockout Device with 3 Keys Childproof Door Knob Covers Lock Out to Smart Doorknob. Safety Cover for Faucet Valve Spigot. Prevent Access to Keyhole Matte White with Brass Keys**AST**$28.55**116 rev8mo ago](https://www.amazon.com/dp/B0FMXFXTRN) [**Keyed Door Handle Lockout Device Cover with Code to Disable Access to Keyhole Combination Lock for Bedroom from Outside Only Fits Handle Lock with Long Connecting Shaft Please Measure Before Order**PUGED**$18.38**48 rev1y ago](https://www.amazon.com/dp/B0FDPNQYJ1) [**PKLIYH Child Proof Door Knob Cover Lock for Dementia Elderly Safety - Universal ABS Plastic Lock-Out Device for Bedroom Bathroom Gas Valve & Outdoor Faucets (Fits Most Circular Knobs)-1 Pack**PKLIYH**$14.90**106 rev1y ago](https://www.amazon.com/dp/B0F395XX5C) [**PILISPARK Child Proof Door Knob Cover Lock Prevents Turning of Door Knob and Access to Keyhole Can be Used for Home Rentals Evictions Job Sites & More Keyed Alike (Black)**PILISPARK**$14.51**153 rev1y ago](https://www.amazon.com/dp/B0DZ6BWDQ6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**2. TEMEILI Drill-Free Security Cover Stainless Steel Anti-Access Protector Stops Rotation & Keyhole Entry for Apartment Scenarios**TEMEILI**$13.84**4.1★**▲ 258%**](https://www.amazon.com/dp/B0BYMRJGPH) [**AST Door Knob Lockout Device with 3 Keys Childproof Door Knob Covers Lock Out to Smart Doorknob. Safety Cover for Faucet Valve Spigot. Prevent Access to Keyhole Matte Silver with Brass Keys**AST**$28.20**4.4★**▲ 129%**](https://www.amazon.com/dp/B0G3NGJJTG) [**AST Door Knob Lockout Device with 3 Keys Childproof Door Knob Covers Lock Out to Smart Doorknob. Safety Cover for Faucet Valve Spigot. Prevent Access to Keyhole Matte White with Brass Keys**AST**$28.55**4.4★**▲ 49%**](https://www.amazon.com/dp/B0FMXFXTRN) [**PILISPARK Child Proof Door Knob Cover Lock Prevents Turning of Door Knob and Access to Keyhole Can be Used for Home Rentals Evictions Job Sites & More Keyed Alike (Black)**PILISPARK**$14.51**4.2★**▲ 29%**](https://www.amazon.com/dp/B0DZ6BWDQ6) [**PUGED Door Knob Lockout Device Cover to Disable Doorknob/Faucet/Water Valve Hose Door Handle Temporary Lock for Bedroom Door from Outside Lock Door Handle Without Drilling**PUGED**$17.77**4.2★**▲ 17%**](https://www.amazon.com/dp/B0CNXC19MQ)
**~~View all trending →~~**
## **What buyers say about door knob lock cover**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Locking Mechanism**16%
*“Locking mechanism works perfect”*
**Ease Of Use**14%
*“Easy to use”*
**Quality-Overall**11%
*“have had no issues with quality or any kind of malfunctions at all”*
**Value For Money**8%
*“Worth the price”*
**Security**8%
*“Keeps my son safe”*
**Advertised Vs Actual Product**8%
*“As pictured”*
**Strength**4%
*“Sturdy easy to use”*
**Size-Overall**4%
*“They fit”*
**Assembly/Installation**3%
*“Easy to identify and install”*
**Safety Standards**3%
*“Very good safety method for toddlers”*
### **What buyers complain about **
**Locking Mechanism**16%
*“bad locks”*
**Ease Of Use**15%
*“Difficult to open”*
**Size-Overall**13%
*“Too snug of a fit”*
**Functionality-Overall**10%
*“Does not work well”*
**Quality-Overall**5%
*“Poor quality control issue that other buyers have experienced as well”*
**Durability**4%
*“It fell apart”*
**Strength**4%
*“Flimsy plastic”*
**Age Suitability**2%
*“Not for older kids”*
**Grip**2%
*“Very little pressure if any of some of them needed to turn the handle”*
**Defective Material/Parts**2%
*“Keys are faulty”*
### **Top return reasons **
**Size-Overall**56%
**Locking Mechanism**9%
**Functionality-Overall**9%
**Compatibility-Overall**5%
**Defective Material/Parts**3%
**Advertised Vs Actual Product**2%
**Weight Heavy**2%
**Mechanism Issues**2%
**Ease Of Use**2%
**Handle Quality**1%
## **Common questions**
- **Is door knob lock cover profitable to sell on Amazon United States?**
- The niche generates $35K/yr across 14 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +13.2%. Flapen's verdict: Skip it (41/100).
- **How competitive is the door knob lock cover niche?**
- 9 brands and 22 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in door knob lock cover?**
- Top complaints mined from reviews: Locking Mechanism, Ease Of Use, Size-Overall. The return rate is 3.8%.
- **When does demand for door knob lock cover peak?**
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- **What does it cost to enter the door knob lock cover niche?**
- Listings span $5.38–$28.55; the average listing price is $16.54 (sweet spot $15–$100). The average incumbent carries 4,407 reviews — the moat a new listing must climb.
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