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Clock Key Size Chart
Size | Swiss | American |
000 | 1.75mm | 2.0mm |
00 | 2.00mm | 2.2mm |
0 | 2.25mm | 2.4mm |
1 | 2.50mm | 2.6mm |
2 | 2.75mm | 2.8mm |
3 | 3.00mm | 3.0mm |
4 | 3.25mm | 3.2mm |
5 | 3.50mm | 3.4mm |
6 | 3.75mm | 3.6mm |
7 | 4.00mm | 3.8mm |
8 | 4.25mm | 4.0mm |
9 | 4.50mm | 4.2mm |
10 | 4.75mm | 4.4mm |
11 | 5.00mm | 4.6mm |
12 | 5.25mm | 4.8mm |
13 | 5.50mm | 5.0mm |
14 | 5.75mm | 5.2mm |
15 | 6.00mm | 5.4mm |