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
CAST IRON DRILL BITS
Get It Fast
In Stock at Store Today
Free 1-2 Day Delivery
Same-Day Delivery
Filters
Filters
Clear All
Material Application: Cast Iron
Drilling Depth (in): 2.8125
Drilling Depth (in): 3.3125
Drilling Depth (in): 4.5
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
Twist Drill Bits
Review Rating
5
4 & Up
3 & Up
2 & Up
1 & Up
Brand
Drill America
Milwaukee
Price
to
Apply
$0 - $10
$10 - $20
$20 - $30
$30 - $40
$100 - $150
$150 - $200
Bit Diameter
1/2 in
5/16 in
11/32 in
21/64 in
O
Bit Length (in.)
4.57 in
4.62 in
6 in
12 in
Bit Material
High Speed Steel
Cobalt
Carbide
Titanium
Number of Pieces
1 Piece
5-10 Pieces
Material Application
Stainless Steel
Cast Iron
Aluminum
Duct/Sheet Metal
Steel
Angle Iron
Copper
Nickel
PVC
Plaster
Wood
Vinyl Flooring
Linoleum
Shank Style
Straight
3-Flat
Round
Hex
Shank Diameter
1/2 in
1/4 in
3/8 in
5/16 in
21/64 in
O
Drilling Depth (in)
0
0.06
0.0625
0.078125
0.125
0.1875
0.25
0.3125
0.375
0.5
0.5625
0.625
0.6698
0.6875
0.734375
0.75
0.8125
0.82857
0.86614173
0.875
0.9375
0.985
1
1.015625
1.0625
1.125
1.1426
1.1875
1.25
1.3125
1.375
1.4375
1.4578
1.495
1.5
1.56
1.5625
1.6154
1.62
1.625
1.6875
1.73228346
1.75
1.81
1.8125
1.87
1.875
1.8912
1.9375
2
2.0094
2.125
2.1276
2.1875
2.21
2.25
2.3125
2.375
2.435
2.4375
2.46875
2.5
2.500
2.5625
2.609375
2.625
2.75
2.8125
2.875
2.890525
2.9375
3
3.0625
3.1875
3.3125
3.375
3.4375
3.5
3.625
3.75
3.875
3.9375
4
4.0625
4.125
4.1875
4.25
4.3125
4.375
4.5
4.75
4.8125
5.1875
5.375
5.625
6
6.125
13
18
20
View Results
All Filters
Category
Bit Diameter
Bit Length (in.)
Bit Material
Number of Pieces
Material Application: Cast Iron
Drilling Depth (in): 2.8125
Drilling Depth (in): 3.3125
Drilling Depth (in): 4.5
Clear All
15 Results
Sort by:
Top Sellers
Top Sellers
Most Popular
Price Low to High
Price High to Low
Top Rated Products
More Options Available
$
26
.
97
(4105)
Model# 48-89-2329
Milwaukee
1/2 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
More Options Available
$
12
.
97
(4095)
Model# 48-89-4619
Milwaukee
SHOCKWAVE 11/32 in. Titanium Twist Drill Bit
Add to Cart
More Options Available
$
31
.
01
(
$5.17
/unit)
(84)
Model# HD3F1/2P6
Drill America
1/2 in. HSS Black and Gold Contractor Drill Bit with Split Point and 3-Flat Shank (6-Pack)
Add to Cart
Top Rated
More Options Available
$
119
.
00
(
$23.80
/unit)
(359)
Model# 48-89-2329-X5
Milwaukee
1/2 in. Cobalt Red Helix Twist Drill Bit (5-Pack)
Add to Cart
More Options Available
$
198
.
00
(
$19.80
/unit)
(249)
Model# 48-89-2329-X10
Milwaukee
1/2 in. Cobalt Red Helix Twist Drill Bit (10-Pack)
Add to Cart
More Options Available
$
9
.
28
(129)
Model# GLBCOX65/16
Drill America
5/16 in. x 6 in. Cobalt Aircraft Extension Drill Bit
Add to Cart
More Options Available
$
5
.
49
(134)
Model# DWDA/CX65/16
Drill America
5/16 in. x 6 in. High Speed Steel Aircraft Extension Drill Bit
Add to Cart
More Options Available
$
15
.
03
(50)
Model# GLBCOX125/16
Drill America
5/16 in. x 12 in. Cobalt Aircraft Extension Drill Bit
Add to Cart
More Options Available
$
7
.
18
(90)
Model# DWDA/CX125/16
Drill America
5/16 in. x 12 in. High Speed Steel Aircraft Extension Drill Bit
Add to Cart
$
17
.
66
(
$2.94
/unit)
(3)
Model# D/ASP21/64P6
Drill America
21/64 in. High Speed Steel Black Oxide Premium General Purpose Split Point Twist Drill Bit (6-Pack)
Add to Cart
More Options Available
$
25
.
27
Model# D/ACT21/64
Drill America
21/64 in. Carbide Tipped Twist Drill Bit
Add to Cart
More Options Available
$
13
.
34
(
$2.22
/unit)
(3)
Model# D/AP21/64P6
Drill America
21/64 in. High Speed Steel Twist Drill Bit with Bright Finish (6-Pack)
Add to Cart