Shop All Savings
Appliances
Bath & Faucets
Blinds & Window Treatment
Building Materials
Lumber & Composites
Cleaning
Decor & Furniture
Lighting & Ceiling Fans
Doors & Windows
Electrical
Flooring & Area Rugs
Hardware
Heating & Cooling
Kitchen & Kitchenware
Lawn & Garden
Outdoor Living & Patio
Paint
Plumbing
Seasonal Decor
Smart Home
Storage & Organization
Tools
Automotive
Furniture
Gift Cards
Credit Cards
View All Home Services
Tool Rental
Benefits & Services For the Pro
Project Calculators
View All DIY Projects
Local Ad
Store Finder
Site Map
#1 Home Improvement Retailer
Select store
...
...
Cart
Select store
...
...
Shop All
Services
DIY
Log In
Cart
Home
/
Tools
/
Power Tool Accessories
/
Drill Bits
3-FLAT DUCT/SHEET METAL DRILL BITS
Get It Fast
In Stock at Store Today
Free 1-2 Day Delivery
Same-Day Delivery
Filters
Filters
Clear All
Shank Style: 3-Flat
Material Application: Duct/Sheet Metal
Shank Diameter: 1/4 in
Shank Diameter: Assorted
Shank Diameter: 3/16 in
Get It Fast
In Stock at Store Today
Free 1-2 Day Delivery
Same-Day Delivery
Availability
Show Out of Stock
Department
Tools
Power Tool Accessories
Drill Bits
Step Drill Bits
Installer Bits
Twist Drill Bits
Review Rating
5
4 & Up
3 & Up
2 & Up
1 & Up
Brand
Milwaukee
Drill America
Bosch
Price
to
Apply
$0 - $10
$10 - $20
$20 - $30
$40 - $50
$50 - $100
Bit Diameter
1/4 in
#11
#12
#1
#4
#5
#7
#8
#9
3/16 in
3/4 in
3/8 in
Bit Length (in.)
3 in
3.11 in
3.5 in
4 in
4.8 in
4.9 in
24 in
Bit Material
Black Oxide
High Speed Steel
Number of Pieces
1 Piece
2-4 Pieces
11-20 Pieces
Shank Style
3-Flat
Material Application
Stainless Steel
Duct/Sheet Metal
Aluminum
Steel
Cast Iron
Angle Iron
Copper
Linoleum
Nickel
PVC
Vinyl Flooring
Wood
Shank Diameter
1/2 in
1/4 in
1/16 in
1/8 in
3/8 in
3/16 in
3/32 in
5/32 in
5/16 in
5/64 in
7/64 in
9/64 in
11/32 in
17/64 in
23/64 in
25/64 in
29/64 in
Individual/Set
Individual
Drilling Depth (in)
0.0781
2.3125
2.375
2.75
3
6
20
View Results
All Filters
Category
Bit Diameter
Bit Length (in.)
Bit Material
Number of Pieces
Shank Style: 3-Flat
Material Application: Duct/Sheet Metal
Shank Diameter: 1/4 in
Shank Diameter: Assorted
Shank Diameter: 3/16 in
Clear All
12 Results
Sort by:
Top Sellers
Top Sellers
Most Popular
Price Low to High
Price High to Low
Top Rated Products
Top Rated
More Options Available
$
74
.
97
(1373)
Milwaukee
7/8 in. - 1-3/8 in. #12 Black Oxide Step Drill Bit (5-Steps)
Add to Cart
More Options Available
$
24
.
97
(1379)
Milwaukee
1/8 in. - 1/2 in. #1 Black Oxide Step Drill Bit (13-Steps)
Add to Cart
Top Rated
More Options Available
$
99
.
99
(1379)
Milwaukee
1/4 in. - 1-3/8 in. #5 Black Oxide Step Drill Bit (10-Steps)
Add to Cart
$
99
.
99
(23)
Milwaukee
#9 x 7/8 in. and 1-1/8 in. Black Oxide Step Drill Bit (2-Pack)
Add to Cart
Top Rated
More Options Available
$
56
.
99
(1377)
Milwaukee
1/2 in. - 1 in. #8 Black Oxide Step Drill Bit (9-Steps)
Add to Cart
More Options Available
$
20
.
99
(78)
Milwaukee
3/8 in. x 24 in. Bell Hanger Bit
Add to Cart
$
44
.
99
(5)
Milwaukee
1/4 in. - 3/4 in. x 1/16 in. #3 Step Black Oxide Drill Bit
Add to Cart
More Options Available
$
13
.
55
(
$1.13
/unit)
(84)
Drill America
1/4 in. HSS Black and Gold Contractor Drill Bit with Split Point and 3-Flat Shank (12-Pack)
Add to Cart
$
7
.
39
(167)
Bosch
1/4 in. x 18 in. Installer Drill Bit
Add to Cart
Top Rated
More Options Available
$
56
.
99
(1375)
Milwaukee
7/8 in. #7 Black Oxide Step Drill Bit (1-Step)
Add to Cart
$
79
.
99
(15)
Milwaukee
3/16 in. - 7/8 in. x 1/16 in. #4 Step Drill Bit (2 Pack)
Add to Cart
Top Rated
More Options Available
$
74
.
99
(1371)
Milwaukee
7/8 in. - 1-7/32 in. #11 Black Oxide Step Drilll Bit (13-Steps)
Add to Cart