Is the flat shank on all bits?

The shank is round for the bits sized 1/16” to 1/8”. For bits sized 13/64” to 1/2”, they have the three flat shank.

Will these drill thru stainless?

YES. The DWA1181 DEWALT 21-pack black oxide twist drill bit set is ideal for general-purpose drilling materials like metal. It’s no secret that stainless steel is in fact a metal. I’ve used the 9/16” version (not included in this set, but exact same parabolic flute 31 degree helix design) to drill perfect holes in very hard 1/4” thick stainless steel. Use a drill press, not a hand held drill, go slow and use a good lubricant like Anchor. The bit cuts very smoothly and the resulting hole is smooth and shiny inside. Just my 2 cents.

Are these universal? Do they fit most drills?

Yes, the largest drill bit shank in the DWA1181 is a 1/2".

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Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181)

Product ID: 314046508

Details

Brand
DEWALT
Cutting Angle String
135 Degrees
Finish Type
Brushed
Material
High Speed
Shank Type
Straight

🎯135° split point precision

⚙️21-piece versatile set

🛡️Black oxide corrosion resistance

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Description

🛠️ Drill Like a Pro, Last Like a Legend

PRECISION ON CONTACT - 135° split point tips eliminate walking, ensuring exact drill placement every time.
SMOOTH DEEP DRILLING - 31° helix angle combined with parabolic flutes optimizes chip ejection and reduces bit aggressiveness.
ALL IN ONE POWER PACK - 21 high-speed steel bits cover metal, wood, PVC & fiberglass drilling needs effortlessly.
RUST PROOF RELIABILITY - Black oxide coating extends bit life by resisting corrosion and wear for long-term performance.
SECURE GRIP ZERO SLIP - 3-flats shank design prevents spin-out, delivering consistent control and accuracy.

The DEWALT 21-piece High Speed Steel drill bit set features black oxide coating for corrosion resistance, 135° split point tips for precise starts, and a 31° helix with parabolic flutes for efficient chip removal. Designed for versatile use on metal, wood, PVC, and fiberglass, this set combines durability and precision to meet professional and DIY demands alike.

Specifications

ASIN	B079VJMH6T
Best Sellers Rank	#3,698 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Jobber Drill Bits
Brand Name	DEWALT
Customer Reviews	4.8 4.8 out of 5 stars (5,843)
Cutting Angle String	135 Degrees
Finish Types	Brushed
Global Trade Identification Number	00885911426749
Included Components	(1) 21 Piece drill bit set
Item Dimensions	8.75 x 1.38 x 8.75 inches
Item Type Name	Drill Bits
Item Weight	1 Pounds
Manufacturer	DEWALT
Material Type	High Speed Steel (HSS)
Model	DWA1181
Number of Flutes	2
Number of Pieces	1
Part Number	DWA1181
Point Style	Split Point
Set Name	21-Piece
Shank Type	Straight
Surface Recommendation	Fiberglass,Metal,Plastic,Pvc,Wood
Tool Flute Type	Parabolic
UPC	885911426749

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₨25159

Duties & taxes included

In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Sri Lanka.

Secure transaction

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