1. Blind measurement, self-locked inflexion

2. Easy calibration by one button

3. Set flexibly standard value, without designated standard ring gauge

4. Display trim size and relative size of the bore

5. Lock measurement state to prevent mistake operation

6. Preset the size of the bore

7. Mm/in switch at any position

8. Auto/hand shutdown

9. With large screen digital display

10. Resolution: 0. 005mm, accuracy: 0. 015mm

11. Mechanical components made by aero aluminium, portable and pleasing to the aye

12. Porcelain oxidization lifts the hardness of crust to HRC 60° and strengthen the clurability of crust.

13. The sensor is made of glass fixed fence of self-owned interllectual property rights, ensuring great stability of the indicator