Single-use Mechanical Radian Table Lens Base Bending Measuring Instrument Glasses Testing Tool

1. The top of the probe head is smooth, not easy to wear the lens
2. Precise scale, clearly visible
3. Thread design, feel comfortable, non-slip and not easy to fall
4. Material: stainless steel
5. Scale: 0-20 degrees
6. Weight: about 118 grams
7. Dimensions: 50 x 60mm