- 測砧和測微螺桿都帶有一個小直徑測頭，可用於測量花鍵軸、槽和鍵溝。
- 達到IP65塵/水防護等級。
- 測量面為硬質合金。
- 帶有恆定測力的裝置。
規格:
| Metric | ||||
| Order No | Range | Accuracy | Remarks | Mass |
| 331-251-30 | 0-25mm | ±2µm | Type A | 330g |
| 331-252-30 | 25-50mm | ±2µm | Type A | 470g |
| 331-253-30 | 50-75mm | ±2µm | Type A | 625g |
| 331-254-30 | 75-100mm | ±3µm | Type A | 565g |
| 331-261-30 | 0-25mm | ±2µm | Type B | 330g |
| 331-262 | 25-50mm | ±2µm | Type B | 470g |
| 331-263-30 | 50-75mm | ±2µm | Type B | 625g |
| 331-264-30 | 75-100mm | ±3µm | Type B | 565g |
| Inch/Metric | ||||
| Order No | Range | Accuracy | Remarks | Mass |
| 331-351-30 | 0-1in 0-25.4mm | ±.0001 | Type A | 330g |
| 331-352-30 | 1-2in 25.4-50.8mm | ±.0001 | Type A | 470g |
| 331-353-30 | 2-3in 50.8-76.2mm | ±.0001 | Type A | 625g |
| 331-354-30 | 3-4in 76.2-101.6mm | ±.00015 | Type A | 565g |
| 331-361-30 | 0-1in 0-25.4mm | ±.0001 | Type B | 330g |
| 331-362-30 | 1-2in 25.4-50.8mm | ±.0001 | Type B | 470g |
| 331-363-30 | 2-3in 50.8-76.2mm | ±.0001 | Type B | 625g |
| 331-364-30 | 3-4in 76.2-101.6mm | ±.00015 | Type B | 565g |
