[Material]: Aluminium body, Jeweled bearing, Revolution counter with dial lock screw.

[Standard]: AGD2 standards.

[Size]:
Measuring Range: 0 - 2",
Accuracy (1st 2.5 Rev): +/- 0.001"
Accuracy (Overall): +/- 0.003",
Reading: 0-100,
Lug Back: 1/4" Holes,
Dial Diameter: 2.28",
Stem Diameter: 3/8".