Blue Ribbon™ High Speed Twist Drills

$22.05 - $36.75
1 - 11
12 +
  Priced per dozen.
Total ---
Jobbers length twist drills made of the finest high-speed steel. Heat treated to a hardness of 63–65 HRC and precision-ground to a tolerance of +0.0000 to –0.0003". Can be used on all metals. Made in USA.

Sold by the dozen.
B&S
Gauge
Millimeter
(mm)
Inch
(decimal)
Inch
(fraction)
1 7.348 0.289
2 6.543 0.258
6.350 0.250 1/4
5.953 0.234 15/64
3 5.827 0.229
5.556 0.219 7/32
4 5.189 0.204
5.154 0.203 13/64
4.762 0.188 3/16
5 4.621 0.182
4.366 0.172 11/64
6 4.115 0.162
3.969 0.156 5/32
7 3.664 0.144
3.572 0.141 9/64
8 3.263 0.128
3.175 0.125 1/8
9 2.906 0.114
2.778 0.109 7/64
10 2.588 0.102
2.381 0.094 3/32
11 2.304 0.091
12 2.052 0.081
1.984 0.078 5/64
13 1.828 0.072
14 1.628 0.064
1.588 0.063 1/16
15 1.449 0.057
16 1.291 0.051
1.191 0.047 3/64
17 1.149 0.045
18 1.024 0.040
19 0.912 0.036
20 0.812 0.032
0.795 0.031 1/32
21 0.723 0.028
22 0.644 0.025
23 0.573 0.023
24 0.511 0.020
25 0.455 0.018
26 0.405 0.016
0.396 0.015 1/64
27 0.360 0.014
28 0.321 0.013
29 0.286 0.011
30 0.255 0.010
31 0.227 0.0089
32 0.202 0.0080
33 0.180 0.0071
34 0.160 0.0063
35 0.142 0.0056
36 0.127 0.0050
37 0.113 0.0045
38 0.101 0.0040
39 0.090 0.0035
40 0.080 0.0031
B&S
Gauge
Millimeter
(mm)
Inch
(decimal)
Inch
(fraction)
Drill # Diameter
50 0.070"
51 0.067"
52 0.0635"
53 0.0595"
54 0.055"
55 0.052"
56 0.0465"
57 0.043"
58 0.042"
59 0.041"
60 0.040"
61 0.039"
62 0.038"
63 0.037"
64 0.036"
65 0.035"
66 0.033"
67 0.032"
68 0.031"
69 0.0292"
70 0.028"
71 0.026"
72 0.025"
73 0.024"
74 0.0225"
75 0.021"
76 0.020"
77 0.018"
78 0.016"
79 0.0145"
80 0.0135"
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