5/16 drill bits
Worth a lookShows searches that convert (16.6% search→purchase), but soft demand (+2.9% this quarter) keeps it on the watch list.
Conversion
Incredible16.6%search→purchase rate — share of searches ending in a sale
Returns
Great1.2%return rate — above 5% kills the launch gate
Brand share
Good61%top-5 brand share — brands hold most of the demand
Avg price
Good$14.78avg listing price — sweet spot $15–$100
Price range
Good$4.02–$29.07cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Review moat
Okay2,110.69avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Okay$145K$145K/yr · 59K searches
Growth
Okay+2.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, 5/16 drill bits is a $145K/yr Amazon United States market (59K searches/yr). The top 5 brands hold 61% of demand. Verdict: Worth a look — 55/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
5/16 drill bits market data
- Units sold / yr
- 8K–10K
- avg 250–500/product
- Revenue / yr
- $118K–$148K
- units × avg price
- Conversion rate
- 16.6%
- Avg BSR
- #87
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 81%
- Out of stock
- 0.0%
- Avg brand age
- 56 months
- Avg seller age
- 163 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
21 rising
Sellers
42
Top-5 brand share
61%
Top 20: 99%
Top-5 click share
54%
Top 20: 95%
Open market
33%
- Bosch22%
- DEWALT12%
- Narwhal11%
- amoolo9%
- Drill Hulk7%
- RCINDUS6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +2.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top 5/16 drill bits search terms
- 5/16 drill bit47K/yr
- 5/16 drill bit for metal7K/yr
- 5/16 cobalt drill bit3K/yr
- 5/16 drill bits3K/yr
Top 5/16 drill bits 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bosch CO2147B 5/16 in. X 4-1/2 in. Cobalt M42 Drill Bit
Bosch$7.114.6★7,163 rev
DEWALT Drill Bit Set 3-Flats Shank 14-Piece 135 Degree Split Point for Plastic Wood and Metal (DWA1184)
DEWALT$14.144.8★20,301 rev
Narwhal 5/16 Inch Cobalt Drill Bits (3 Pack - Industrial Grade M35 Cobalt) 4-5/8 Length & 135 Degree Split Point for Drilling Into Metal Hardened & Stainless Steel Cast Iron & More!
Narwhal$11.544.4★950 rev
amoolo 5/16 Cobalt Drill Bit 10pcs
amoolo$27.574.5★4,228 rev
5/16-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal Stainless Steel Pack of 6
Drill Hulk$25.234.6★2,855 rev
Newest
by launch date
QWORK 5/16 Inch Cobalt Drill Bits 3 Pcs M35 Industrial Grade 5% Cobalt 135 Degree Split Point Fully Ground Metal Drill Bit Set for Stainless Steel Hardened Steel Cast Iron Titanium
QWORK$8.383 rev
5/166 Professional Auger Drill Bit for Wood with Quick Change 1/4 Hex Shank- 3-Cutter Design with Dual-Flute for Fast Chip Removal Fits Hardwood Softwood PVC Drywall & Tree Stumps
METOTY$4.02120 rev
CoCud Drill Bit 5/16 Cutting Diameter (7.938mm) 4241 HSS Jobber Bits Black and Gold 118 Cutting Angle Versatile - (Applications: for Drilling Plastic Wood Soft Thin Metal) 2-Pieces
CoCud$6.1017 rev
METALLIXITY Drill Bit (5/16) 2Pcs 4241 High-Speed Steel Straight Shank Gold Finish 135 for Wood Plastic Iron Copper Aluminum Low Soft Metal
METALLIXITY$6.2019 rev
5/16 Inch Drill Bit (3 Pack) Industrial Grade M35 Cobalt Titanium Aluminum Nitrite - 5/16 Diameter & Total Length of 4 with Working Length of 2-3/4 Easily Drill Into Metal Steel & Aluminum
Yellow Paw$13.801,581 rev
Trending
90-day click momentum5/166 Professional Auger Drill Bit for Wood with Quick Change 1/4 Hex Shank- 3-Cutter Design with Dual-Flute for Fast Chip Removal Fits Hardwood Softwood PVC Drywall & Tree Stumps
METOTY$4.024.5★
QWORK 5/16 Inch Cobalt Drill Bits 3 Pcs M35 Industrial Grade 5% Cobalt 135 Degree Split Point Fully Ground Metal Drill Bit Set for Stainless Steel Hardened Steel Cast Iron Titanium
QWORK$8.385.0★
KENDO 5/16 Inch Cobalt Drill Bits (13pcs) M35 High Speed Steel 135 Degree Tip Jobber Length Twist Drill Bit Set for Hard Metal Stainless Steel Cast Iron Wood and Plastic with Storage Case
Kendo$19.684.5★
JEFE HEX 5/16-Inch High Speed Steel with 3-Flat Shanks Black & Gold Finished Jobber Length Twist Drill Bit 135 Degree Split Point (2-Piece)
JEFE HEX$7.434.4★
Klein Tools 32768 Impact Driver Set 3-in-1 SAE Impact Socket and Bit Holder Flip Socket with Nut Drivers in 1/4 and 5/16 Hex Sizes 3 and 5-Inch Lengths 2-Piece
KLEIN TOOLS$16.064.5★
What buyers say about 5/16 drill bits
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality”
“Great deal”
“As advertised”
“very durable”
“These are real good and sharp”
“These are real good and sharp”
“Correct sizing”
“Very Convenient to have these around”
“They feel sturdier”
“The case is compact and organized, making it easy to grab the size you need”
What buyers complain about
“Quality not good”
“Broke”
“A bit pricey”
“Deceptive advertising, delivers round shank, not 3-flat shank drill bits”
“The drill bits themselves feel sticky to touch”
“top attachment falls off easy”
“shows signs of wear”
“The all in one did not work for me”
“plastic just want to say”
“theyre not sharp or hard enough to drill mild steel”
Top return reasons
Common questions
- Is 5/16 drill bits profitable to sell on Amazon United States?
- The niche generates $145K/yr across 26 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +2.9%. Flapen's verdict: Worth a look (55/100).
- How competitive is the 5/16 drill bits niche?
- 21 brands and 42 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 61% of demand.
- What do buyers complain about in 5/16 drill bits?
- Top complaints mined from reviews: Quality-Overall, Durability, Value For Money. The return rate is 1.2%.
- When does demand for 5/16 drill bits peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the 5/16 drill bits niche?
- Listings span $4.02–$29.07; the average listing price is $14.78 (sweet spot $15–$100). The average incumbent carries 2,111 reviews — the moat a new listing must climb.