1. Has finely honed jaws for exacting inside, outside and depth measurements
2. Total length:9 1/4"
3. Maximum Opening:6"

Measures both ID and OD in inches and millimeters

With accuracy to 1/20 mm and 1/128"

Slide and lock included; comes in a protective wood box

Total length: 9 1/4"

Maximum Opening: 6"(150mm)