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 smarter, last longer—own the job site with Dewalt precision!

DEEP DIVE DRILLING - 31° helix design reduces aggressiveness, perfect for deep, controlled holes.
ALL MATERIAL MASTERY - Engineered for metal, hardwood, PVC & fiberglass—one set to rule them all.
PRECISION ON CONTACT - 135° split-point tips prevent walking, delivering clean, accurate starts every time.
STAY SHARP STAY STRONG - Black oxide coating resists corrosion for long-lasting durability and peak performance.
EFFORTLESS CHIP EJECTION - Parabolic flute design speeds up debris removal, keeping your workflow smooth and efficient.

The Dewalt DWA1181 21-piece black oxide coated HSS twist drill bit set offers professional-grade versatility and durability. Designed with a parabolic flute for efficient chip ejection and a 135° split-point tip to prevent walking, this set excels in drilling metal, hardwood, softwood, PVC, and fiberglass. Its corrosion-resistant black oxide finish ensures long-lasting performance, making it an essential toolkit upgrade for serious craftsmen and managers who demand reliability and precision.

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Manufacturer	DEWALT
Part number	DWA1181
Item Weight	454 g
Product Dimensions	22.23 x 3.51 x 22.23 cm; 453.59 g
Item model number	DWA1181
Size	One Size
Color	multi
Style	Classic
Finish	Brushed
Material	High Speed Steel (HSS)
Pattern	Solid
Shape	Rectangular
Power source type	Hand Powered
Voltage	120
Item Package Quantity	1
Number Of Pieces	1
Included components	(1) 21 Piece drill bit set
Batteries Included?	No
Batteries Required?	No

Dewalt Dwa1181 21-Piece Set Black Oxide Coated Hss Twist Drill Bit Set

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