They are made from high speed steel M2.
They are used for enlaring holes for the socket heads of cap screws.
Features an oversizes solid pilot.
With striaght/round shank.
Metric and imperial.
Kinds of sets available.
Screw Size |
Pilot Diam. |
Cutter Diam. |
Shank Diam. |
5 |
.141" |
.221" |
3/16" |
6 |
0.15 |
0.242 |
7/32 |
8 |
11/64 |
19/64 |
1/4 |
10 |
13/64 |
21/64 |
5/16 |
1/4 |
9/32 |
13/32 |
3/8 |
5/16 |
11/32 |
1/2 |
7/16 |
3/8 |
13/32 |
19/32 |
1/2 |
7/16 |
15/32 |
11/16 |
1/2 |
1/2 |
17/32 |
25/32 |
1/2 |
5/8 |
21/32 |
31/32 |
3/4 |
3/4 |
13/16 |
1 3/16 |
1 |
Screw Size |
Pilot Diameter |
Shank Diameter |
Total Length |
|
|
|
|
1 |
0.75 |
2.2 |
45 |
1.2 |
0.95 |
2.5 |
45 |
1.4 |
1.1 |
2.8 |
45 |
1.6 |
1.25 |
3.3 |
56 |
1.8 |
1.45 |
3.8 |
56 |
2 |
1.6 |
4.3 |
56 |
2.5 |
2.05 |
5 |
56 |
3 |
2.5 |
5 |
71 |
3.5 |
2.9 |
5 |
71 |
4 |
3.3 |
5 |
71 |
4.5 |
3.7 |
8 |
80 |
5 |
4.2 |
8 |
80 |
6 |
5 |
8 |
80 |
7 |
6 |
12.5 |
100 |
8 |
6.8 |
12.5 |
100 |
9 |
7.8 |
12.5 |
100 |
10 |
8.5 |
12.5 |
100 |
12 |
10.2 |
12.5 |
100 |