Depth Micrometer Scale Micrometer Ratchet Depth Accurate Tools 

    How to measure the depth of hole precisely?  Depth Micrometer is the best tools for doing such work.  With interchangeable rods, the mic can measure the deep hole as deep as 300mm/12 inch, The base is served as benchmark for the point A and the measuring tips for point B.  When rotate the screw and the rods touch the bottom of  hole (B),  The micrometer will show distance from A to B. 

Features: 

1. Flat tips (spherical tips are optional)

2. Base length 101.5mm/4"(63mm/2.5" is optional)

3. With interchangeable rods.

4. Satin chrome finish

5. Ratchet thimble

6. Locking clamp

7. Non digital 

Metric