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
/
Twist Drill Bits
TWIST DRILL BITS
Get It Fast
In Stock at Store Today
Free 1-2 Day Delivery
Same-Day Delivery
Filters
Filters
Clear All
Bit Diameter: Z
Bit Diameter: 5/16 in
Material Application: Aluminum
Bit Material: Cobalt
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
$40 - $50
$50 - $100
$100 - $150
Bit Diameter
1/8 in
1/2 in
1/4 in
5/16 in
#23
#27
#37
#47
3/16 in
3/8 in
5/32 in
11/64 in
19/64 in
H
#13
#14
#18
#22
#24
#38
#39
#46
25/64 in
35/64 in
B
D
G
J
N
O
X
Y
#12
#15
#16
#25
#31
#3
#41
#48
#49
#4
#51
#52
#53
#56
#57
#59
#5
#61
#63
#77
#79
#80
#8
3/32 in
5/64 in
7/32 in
7/64 in
9/32 in
9/64 in
11/16 in
13/32 in
13/64 in
15/64 in
17/32 in
29/32 in
37/64 in
47/64 in
57/64 in
61/64 in
A
C
L
M
Q
S
T
U
V
W
Z
#11
#17
#19
#20
#21
#26
#28
#2
#33
#34
#35
#36
#40
#42
#44
#45
#50
#55
Bit Material
High Speed Steel
Cobalt
Titanium
Carbide
Number of Pieces
1 Piece
5-10 Pieces
11-20 Pieces
Material Application
Stainless Steel
Aluminum
Cast Iron
Duct/Sheet Metal
Steel
Angle Iron
Copper
Nickel
PVC
Plaster
Wood
Vinyl Flooring
Linoleum
Bit Length (in.)
2.81 in
3.37 in
4.5 in
5.25 in
6 in
6.37 in
12 in
Shank Style
Straight
3-Flat
Features
No Additional Features
Shank Diameter
3/8 in
5/16 in
Z
Drilling Depth (in)
1.625
2
2.8125
3.1875
3.875
4
Featured Keywords
black oxide
extra length
high speed steel
round shank
bits core
black oxide drill bit
cobalt alloy
fast drilling
hard metal
jobber length
length drill bit
longer life
nickel alloy
precision start
split point
taper length drill
variable helix
View Results
All Filters
Bit Diameter
Bit Material
Number of Pieces
Material Application
Bit Length (in.)
Bit Diameter: Z
Bit Diameter: 5/16 in
Material Application: Aluminum
Bit Material: Cobalt
Clear All
9 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
$
10
.
47
(3952)
Model# 48-89-2317
Milwaukee
5/16 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
51
.
97
(
$10.39
/unit
)
(386)
Model# 48-89-2317-X5
Milwaukee
5/16 in. Cobalt Red Helix Twist Drill Bit (5-Pack)
Add to Cart
Compare
More Options Available
$
9
.
28
(120)
Model# GLBCOX65/16
Drill America
5/16 in. x 6 in. Cobalt Aircraft Extension Drill Bit
Add to Cart
Compare
More Options Available
$
17
.
33
(50)
Model# GLBCOX125/16
Drill America
5/16 in. x 12 in. Cobalt Aircraft Extension Drill Bit
Add to Cart
Compare
More Options Available
$
61
.
24
(
$5.10
/unit
)
(3)
Model# D/ASTCO5/16P12
Drill America
5/16 in. M42 Cobalt Short Twist Drill Bit (12-Piece)
Add to Cart
Compare
More Options Available
$
140
.
00
(
$14.00
/unit
)
(286)
Model# 48-89-2317-X10
Milwaukee
5/16 in. Cobalt Red Helix Twist Drill Bit (10-Pack)
Add to Cart
Compare
More Options Available
$
18
.
78
Model# DWDTLCO5/16
Drill America
5/16 in. Cobalt Taper Length Twist Drill Bit
Add to Cart
Compare
More Options Available
$
45
.
52
(
$7.59
/unit
)
(1)
Model# DWDCOZP6
Drill America
Z M35 Cobalt Drill Bit (6-Piece)
Add to Cart
Compare
More Options Available
$
70
.
99
(
$11.83
/unit
)
Model# D/ASTCOZP6
Drill America
Z M42 Cobalt Short Twist Drill Bit (6-Piece)
Add to Cart
Compare