Made of special steel black for metric and inch sizes.
0.
7 mm = 0,028" 0.
9 mm = 0.
035" 1.
3 mm = 0.
050" 1.
6 mm = 1.
16" 2.
0 mm = 5.
64" 2.
4 mm = 3,32" 2.
8 mm = 7.
64" 3.
2 mm = 1.
80" 3.
4 mm = 9,64" 4.
0 mm = 5.
32".