door knob lock cover
Skip itA small market ($35K/yr) — this niche doesn't clear our bar today.
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Avg price
Great$16.54avg listing price — sweet spot $15–$100
Conversion
Good5.6%search→purchase rate — share of searches ending in a sale
Price range
Good$5.38–$28.55cheapest 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
Okay3.8%return rate — above 5% kills the launch gate
Brand share
Okay88%top-5 brand share — brands hold most of the demand
Competition
Bad70%top-5 click share — a locked-up shelf
Review moat
Bad4,407.43avg 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
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.No pronounced peak months · busiest ÷ quietest = 1.2×
Top door knob lock cover search terms
- door knob lockout device12K/yr
- door knob lock cover16K/yr
- door knob cover lock6K/yr
- doorknob lockout device4K/yr
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.
All 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Prime-Line S 4180 Door Knob Lock-Out Device Gray Single Pack
PRIME-LINE$13.854.2★3,522 rev
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$14.514.2★153 rev
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$17.774.2★127 rev
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$18.424.2★167 rev
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$17.384.5★288 rev
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$28.20116 rev
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$28.55116 rev
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$18.3848 rev
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$14.90106 rev
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$14.51153 rev
Trending
90-day click momentum
2. TEMEILI Drill-Free Security Cover Stainless Steel Anti-Access Protector Stops Rotation & Keyhole Entry for Apartment Scenarios
TEMEILI$13.844.1★
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$28.204.4★
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$28.554.4★
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$14.514.2★
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$17.774.2★
What buyers say about door knob lock cover
What buyers praise and complain about, mined from review topics.What buyers love
“Locking mechanism works perfect”
“Easy to use”
“have had no issues with quality or any kind of malfunctions at all”
“Worth the price”
“Keeps my son safe”
“As pictured”
“Sturdy easy to use”
“They fit”
“Easy to identify and install”
“Very good safety method for toddlers”
What buyers complain about
“bad locks”
“Difficult to open”
“Too snug of a fit”
“Does not work well”
“Poor quality control issue that other buyers have experienced as well”
“It fell apart”
“Flimsy plastic”
“Not for older kids”
“Very little pressure if any of some of them needed to turn the handle”
“Keys are faulty”
Top return reasons
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.