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6 pc. 4-1/8 In. I Letter Black Oxide Drill Bits
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BL4209
The Bosch line of metal drill bits offers a solution for every professional application. Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating, eliminating the need for a center punch. Bosch black oxide bits offer superior durability, speed and selection to support most general-purpose applications.
Benefits
Speed helix design for three times faster drilling than standard bits
Available in jobber length, stubby length, extended length (aircraft), 1/2 In. reduced shank (Silver and Deming)
Last 50% longer than high-speed steel
For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials
Easier drilling, reduced heat and extended drill bit life
Technical Data
| *Note | All 135° points; all round shank |
| Bulk | false |
| Diameter inch | I |
| Flute Length in | 3.125 |
| Length in | 4.125" |
| Overall Length in | 4.125 |
| Pack Quantity | 12 |
| Shank Diameter in | 0.272 |
BL4209
BL4209
BL4208
BL4211
BL4214
BL4217
BL4224
BL4225
BL4226
Other sizes
BL4224
Diameter inch
X
Overall Length in
5.125
Pack Quantity
12
Shank Diameter in
0.397
*Note
All 135° points; all round shank
BL4225
Diameter inch
Y
Overall Length in
5.25
Pack Quantity
12
Shank Diameter in
0.404
*Note
All 135° points; all round shank
BL4226
Diameter inch
Z
Overall Length in
5.25
Pack Quantity
12
Shank Diameter in
0.412999
*Note
All 135° points; all round shank
BL4208
Diameter inch
H
Overall Length in
4.125
Pack Quantity
12
Shank Diameter in
0.266
*Note
All 135° points; all round shank
BL4211
Diameter inch
K
Overall Length in
4.25
Pack Quantity
12
Shank Diameter in
0.281
*Note
All 135° points; all round shank
BL4214
Diameter inch
N
Overall Length in
4.375
Pack Quantity
12
Shank Diameter in
0.301999
*Note
All 135° points; all round shank
BL4217
Diameter inch
Q
Overall Length in
4.75
Pack Quantity
12
Shank Diameter in
0.332
*Note
All 135° points; all round shank