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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DEWALT Drill Bit Set, 21-Piece, 135 Degree Split Point, 31 Degree Helix, Black Oxide Coated, For Plastic, Wood and Metal (DWA1181)

DEWALT Drill Bit Set, 21-Piece, 135 Degree Split Point, 31 Degree Helix, Black Oxide Coated, For Plastic, Wood and Metal (DWA1181)

Product ID: 301179731

Details

Brand
DEWALT
Cutting angle string
135 Degrees
Finish type
Black Oxide
Material
Blend
Shank type
Straight

🎯135° split-point precision

⚙️21-piece versatile set

🛡️Black oxide corrosion resistance

MX$2459

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Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Drill Like a Pro, Finish Like a Boss!

DEEP HOLE MASTERY - 31° helix angle balances aggressiveness for perfect deep-hole drilling without wear.
ALL IN ONE POWER PACK - 21 precision bits cover plastic, wood, metal & more for every project.
OPTIMIZED CHIP EJECTION - Parabolic flute design speeds debris removal for faster, smoother drilling.
CORROSION RESISTANT ARMOR - Black oxide coating extends bit life, keeping your toolkit sharp and ready.
EFFORTLESS PRECISION DRILLING - 135° split-point tips start on contact, eliminating walking and ensuring clean holes.

The DEWALT 21-piece drill bit set features industrial-grade black oxide-coated bits with 135° split-point tips and a 31° helix angle, engineered for precision and durability across plastic, wood, metal, and fiberglass. Its parabolic flute design enhances chip ejection, making it a versatile, long-lasting choice for professionals and DIYers alike.

Specifications

ASIN	B079VJMH6T
Best Sellers Rank	195,748 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,606 in Drill Bit Sets
Brand	DEWALT
Customer Reviews	4.8 4.8 out of 5 stars (5,768)
Cutting Angle String	135 Degrees
Finish Types	Black Oxide
Global Trade Identification Number	00885911426749
Included Components	(1) 21 Piece drill bit set
Item Dimensions	22.2 x 3.5 x 22.2 centimetres
Item Type Name	Drill Bits
Item Weight	1 Pounds
Manufacturer	DEWALT
Manufacturer Part Number	DWA1181
Material	Blend
Minimum Bore Diameter	2 Millimetres
Model Number	DWA1181
Number of Flutes	2
Number of Packs	1
Number of Pieces	1
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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MX$2459

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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