Is plumb bob profitable to sell on Amazon United States?

The niche generates $283K/yr across 34 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +5.0%. Flapen's verdict: Worth a look (63/100).

How competitive is the plumb bob niche?

21 brands and 667 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 69% of demand.

What do buyers complain about in plumb bob?

Top complaints mined from reviews: Hard Feel, Sour, Taste-Overall. The return rate is 0.0%.

When does demand for plumb bob peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the plumb bob niche?

Listings span $0.95–$59.81; the average listing price is $21.96 (sweet spot $15–$100). The average incumbent carries 551 reviews — the moat a new listing must climb.

plumb bob

Worth a look

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Great$21.96

avg listing price — sweet spot $15–$100

Price range

Great$0.95–$59.81

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Good550.82

avg incumbent reviews — the moat a new listing must climb

Competition

Good44%

top-5 click share — leaders hold, buyers still browse

Conversion

Good5.3%

search→purchase rate — share of searches ending in a sale

Brand share

Good69%

top-5 brand share — brands hold most of the demand

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Good$283K

$283K/yr · 245K searches

Growth

Okay+5.0%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, plumb bob is a $283K/yr Amazon United States market (245K searches/yr). The top 5 brands hold 69% of demand. Verdict: Worth a look — 63/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

plumb bob market data

Units sold / yr: 15K–20K; avg 750–1,000/product
Revenue / yr: $329K–$439K; units × avg price
Conversion rate: 5.3%
Avg BSR: #18
Page quality: 0%
Prime: 88%
Sponsored: 59%
Out of stock: 6.3%
Avg brand age: 63 months
Avg seller age: 171 days

Competition & brand share

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

Brands

21 rising

Sellers

667

Top-5 brand share

69%

Top 20: 99%

Top-5 click share

44%

Top 20: 86%

Open market

26%

HCCMLOVE26%
Johnson21%
Relaxweex8%
AWF PRO8%
Tajima6%
General Tools5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +5.0% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top plumb bob search terms

plumb bob142K/yr +1.3%4.9% conv.
plumb bob with string19K/yr +13.6%5.2% conv.
plum bob14K/yr -0.0%4.6% conv.
plumb11K/yr +20.9%2.9% conv.
plumbob13K/yr +14.5%3.1% conv.
plumb line10K/yr +3.5%3.0% conv.
plum bob tool10K/yr +15.6%5.7% conv.
brass plumb bob5K/yr +51.4%2.8% conv.
plomada de albail5K/yr +14.9%1.0% conv.
plomada7K/yr -11.1%1.2% conv.

All search terms

Top plumb bob 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.

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

HCCMLOVE Plumb Bob Magnetic -10.7 oz(305g) Plumb Rite With 14.5 ft(4.5m) String Sharpener 2 Pencils Line Reel Used in Construction Can Automatically Stretch the Line and Quickly Stabilize the Plumbob

HCCMLOVE$22.694.7★516 rev

Johnson Level & Tool 08 Steel Hexagonal Plumb Bob 8 oz. Steel Finish 1 Pack*

Johnson$9.404.6★351 rev

Plumb Bobs Magnetic - 15 oz(425g) Plumb Rite With 14.5 ft(4.5m) String Sharpener 2 Pencils Carrying Case Line Reel Used in Construction Can Automatically Stretch the Line Quickly Stabilize the Plumbob

HCCMLOVE$25.154.7★516 rev

AWF PRO Plumb Bob Kit - 16 oz and 8 oz Solid Brass Plumb Bobs 14 ft Retractable Line Reel with Magnetic Base 2 Pencils Pencil Sharpener Carrying Case

AWF PRO$45.024.5★549 rev

Relaxweex 2 Pcs Hexagon Steel Plumb Bob SAE 1045 8 Ounce Brass Plumb

Relaxweex$19.124.3★48 rev

Newest

by launch date

2PCS Hexagon Steel Plumb Bob 790-8 8 Ounce Brass Plumb Alloy Steel Building Measuring Hammer Wire Hammer Pendant Metal Building Accessories Crafting Wire Kit

Thrseely$17.2812 rev

9mo ago

Leriton 8 oz Brass Plumb Bob with Replaceable Steel Tip 20 ft String & Hook 2 Carpenter Pencils & Sharpener Accurate Measuring Plum Bob Tool for Contractors Masons DIY Building Surveying (Hexagonal)

Leriton$11.424 rev

10mo ago

4 Pack Hexagon Plumb Bob 8 Ounce Alloy Steel Plumb Bob with 49 Ft String Plumb Bob Tool Plumb Line Kit Suitable for Construction Surveying Metal Construction Accessories

MXOYOXM$26.145 rev

11mo ago

Relaxweex 1 Pcs Hexagon Steel Plumb Bob SAE 1045 8 Ounce Brass Plumb

Relaxweex$14.8248 rev

1y ago

Retractable Plumb Bob With 19.7ft String Magnetic Retractable Plumb Bob Construction Tools Automatically Stretch Line Quickly Stabilize Plumb Bob Tool Plumb Bob Reel Retractable

Generic$7.096 rev

1y ago

What buyers say about plumb bob

What buyers praise and complain about, mined from review topics.

What buyers love

Freshness21%

“Arrived fresh”

Taste-Overall19%

“best tasting, sweetest plums I've ever tasted”

Quality-Overall12%

“I was happy with the quality of these black plums”

Value For Money9%

“Worth the money”

Sweetness5%

“the sweetness is balanced”

Advertised Vs Actual Product5%

“Does It's Job”

Ease Of Use5%

“Perfectly simple and useful”

Flavor4%

“the bottom half had perfect flavor”

Crispiness4%

“Delicious firm and look great”

Weight Heavy3%

“Its heavy enough to hang straight from the ceiling”

What buyers complain about

Hard Feel16%

“Hard as a rock”

Sour13%

“Very sour”

Taste-Overall11%

“Just not tasty”

Quality-Overall8%

“not satisfied with tehe quality of this fruit”

Size-Overall7%

“Large”

Stale/Rotten/Spoiled7%

“not fresh”

Sweetness5%

“no flavor not sweet”

Flavor5%

“Black plums not flavorful”

Bitter5%

“Bitter”

Moist/Dry4%

“I was sent pithy, dry plums”

Top return reasons

Size-Overall37%

Weight Heavy16%

Functionality-Overall10%

Value For Money8%

Defective Material/Parts6%

Advertised Vs Actual Product3%

Durability3%

Rusts/Corrodes3%

Quality-Overall2%

Ease Of Use2%

Common questions

Is plumb bob profitable to sell on Amazon United States?: The niche generates $283K/yr across 34 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +5.0%. Flapen's verdict: Worth a look (63/100).
How competitive is the plumb bob niche?: 21 brands and 667 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 69% of demand.
What do buyers complain about in plumb bob?: Top complaints mined from reviews: Hard Feel, Sour, Taste-Overall. The return rate is 0.0%.
When does demand for plumb bob peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the plumb bob niche?: Listings span $0.95–$59.81; the average listing price is $21.96 (sweet spot $15–$100). The average incumbent carries 551 reviews — the moat a new listing must climb.