• Kích thước bán kính được đánh dấu trên mỗi lá thước.
• Mỗi lá thước cho phép đo cả bán kính bên trong và bên ngoài có cùng kích thước.
• Có khóa kẹp.
 |  |
Thông số kỹ thuật:
| Metric | |||
| Order No. | Range (mm) | Composition of leaves | Remarks |
| 186-110 | 0.4 – 6 | 18 leaves: 0.4, 0.8, 1, 1.2, 1.5, 1.6 mm, 1.75 – 3 mm by 0.25 mm, 3.5 – 6 mm by 0.5 mm | 90o arc |
| 186-902 | 0.5 – 13 | 26 leaves: 0.5 – 13 mm by 0.5 mm | 90oarc, separate part type |
| 186-105 | 1 – 7 | 34 leaves: 1 – 3 mm by 0.25 mm, 3.5 – 7 mm by 0.5 mm | 180o arc |
| 186-106 | 7.5 – 15 | 32 leaves: 7.5 – 15 mm by 0.5 mm | 180o arc |
| 186-107 | 15.5 – 25 | 30 leaves: 15.5 – 20 mm by 0.5 mm, 21 – 25 mm by 1 mm | 180o arc |
| Inch | |||
| Order No. | Range (in) | Composition of leaves | Remarks |
| 186-103 | 1/32 – 17/64 | 16 leaves: 1/32 in – 17/64 in by 64ths | 90o arc |
| 186-101 | 1/3 – 1/4 | 30 leaves: 1/32 in – 1/4 in by 64ths | 180o arc |
| 186-102 | 17/64 – 1/2 | 16 leaves: 17/64 in – 1/2 in by 64ths | 180o arc |
| 186-104 | 9/32 – 33/64 | 16 leaves: 9/32 in – 33/64 in by 64ths | 90o arc |
| 186-901 | 1/64 – 1/2 | 25 leaves: 1/64 in – 17/64 in by 64ths, 9/32 in – 1/2 in by 32nds | – |
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