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Home
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Drill Bits
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Twist Drill Bits
Twist Drill Bits
58 Results
Bit Material: Cobalt
Material Application: Cast Iron
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Drill Bits
Twist Drill Bits
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Brand
Drill America
Milwaukee
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$0 - $10
$10 - $20
$20 - $30
$30 - $40
$40 - $50
$50 - $100
$100 - $150
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Special Values
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Bit Diameter
1/8 in
1/2 in
1/4 in
5/16 in
#23
#27
#37
#47
3/8 in
3/16 in
5/32 in
7/64 in
9/64 in
11/64 in
13/32 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
9/32 in
13/64 in
15/64 in
21/64 in
37/64 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
#58
#60
#62
#64
#65
+ View All
Bit Material
High Speed Steel
Cobalt
Carbide
Titanium
Black Oxide
Multiple
Alloy Steel
Cobalt and Carbon Steel
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Material Application
Stainless Steel
Cast Iron
Steel
Aluminum
Duct/Sheet Metal
Wood
Angle Iron
Copper
PVC
Nickel
Plaster
Vinyl Flooring
Linoleum
Ceramic Tile
Gypsum
Porcelain
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Number of Pieces
1 Piece
5-10 Pieces
11-20 Pieces
21-30 Pieces
41-60 Pieces
Bit Length (in.)
0.75 in
0.875 in
1 in
1.125 in
1.25 in
1.375 in
1.5 in
1.625 in
1.6875 in
1.75 in
1.8125 in
1.875 in
1.8912 in
1.9375 in
2 in
2.00
2.01
2.0625 in
2.125 in
2.1875 in
2.25 in
2.375 in
2.4375 in
2.5 in
2.625 in
2.6875 in
2.75 in
2.8125 in
2.875 in
2.875
2.8762 in
2.9375 in
3 in
3.0625 in
3.125 in
3.125
3.25 in
3.31 in
3.3125 in
3.375 in
3.3884 in
3.5 in
3.5625 in
3.6875 in
3.75 in
3.75
3.875 in
3.88
4 in
4
4.125 in
4.25 in
4.375 in
4.5 in
4.50
4.5
4.652 in
4.75 in
4.875 in
4.8856 in
5 in
5
5.0038 in
5.12
5.125 in
5.2402 in
5.25 in
5.5 in
5.8706 in
5.9888 in
6 in
6
6.25 in
6.375 in
6.5 in
6.625 in
6.75 in
7 in
7.125 in
7.5 in
7.625 in
7.75 in
8 in
8.25 in
8.75 in
9 in
10 in
10.75 in
12 in
12
+ View All
Features
No Additional Features
Shank Style
Straight
3-Flat
Hex
Shank Diameter
3/8 in
#23
#27
#37
#47
5/16 in
11/64 in
19/64 in
H
#13
#14
#18
#22
#24
#38
#39
#46
1/8 in
3/8 in.
25/64 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
1/2 in
1/4 in
3/16 in
5/32 in
5/64 in
7/32 in
7/64 in
9/32 in
9/64 in
13/32 in
13/64 in
15/64 in
21/64 in
35/64 in
37/64 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
#58
#60
#62
#64
#65
+ View All
Drilling Depth (in)
0.125
0.1875
0.25
0.3125
0.375
0.5
0.5625
0.625
0.6875
0.75
0.8125
0.86614173
0.875
0.9375
1
1.0625
1.125
1.1875
1.25
1.3125
1.375
1.4375
1.5
1.5625
1.625
1.6875
1.73228346
1.75
1.81
1.8125
1.875
1.9375
2
2.125
2.1875
2.20472441
2.25
2.3125
2.375
2.5
2.5625
2.625
2.75
2.8125
2.875
2.9375
3
3.0625
3.1875
3.3125
3.4375
3.5
3.50393701
3.62204724
3.625
3.75
3.85826772
3.875
4
4.0625
4.125
4.25
4.37007874
4.375
4.48818898
4.5
4.75
4.8125
4.875
5.1875
5.375
5.625
6.125
+ View All
Individual/Set
Individual
Set
Featured Keywords
black oxide
high speed steel
jobber length
gold oxide
black oxide drill bit
hard metal
cobalt alloy
variable helix
split point
extra length
bits core
2 high speed steel
longer life
length drill bit
round shank
precision start
3 flat shank
3/8 in. shank
5 drill bits
5/64 in. cobalt red helix drill bit
135 degree split point
cobalt steel tool
fast drilling
42 cobalt drill bits
heavy-duty jobber length drill bit
cobalt twist
nickel alloy
quadedge tip
stub length
cobalt drills
standard length
taper length drill
1/2 in. drill bit
1/2. drill
1/8 in. drill bit
5/32 in. drill bit
6 in. cobalt aircraft extension drill bit
42 cobalt drills
118 degree
135 split point
cast iron
center punch
cobalt aircraft extension
cobalt drill bits
cobalt steel
drill chuck
drilling metal
large diameter holes
letter size
long life
m42 alloy
right-hand cut
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Top Rated
More Options Available
$
37
.
97
(3393)
Model# 48-89-2370
Cobalt Red Helix Drill Bit Set for Drill Drivers (15-Piece)
Add to Cart
Compare
Top Rated
More Options Available
$
25
.
47
(3888)
Model# 48-89-2329
Milwaukee
1/2 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
15
.
47
(3887)
Model# 48-89-2321
Milwaukee
3/8 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
7
.
47
(3887)
Model# 48-89-2313
Milwaukee
1/4 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
Top Rated
More Options Available
$
6
.
47
(3886)
Model# 48-89-2309
Milwaukee
3/16 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
10
.
47
(3887)
Model# 48-89-2317
Milwaukee
5/16 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
3
.
97
(3886)
Model# 48-89-2305
Milwaukee
1/8 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
21
.
97
(3879)
Model# 48-89-2325
Milwaukee
7/16 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
6
.
67
(3886)
Model# 48-89-2311
Milwaukee
7/32 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
4
.
97
(3886)
Model# 48-89-2307
Milwaukee
5/32 in. Cobalt Red Helix Twist Drill Bit
Add to Cart
Compare
More Options Available
$
4
.
47
(3886)
Model# 48-89-2306
Milwaukee
9/64 in. Red Helix Cobalt Drill Bit
Add to Cart
Compare
More Options Available
$
5
.
47
(3886)
Model# 48-89-2308
Milwaukee
11/64 in. Cobalt Red Helix Drill Bit
Add to Cart
Compare