• With this Involute Gear Tooth Gage, it is easy to determine the diametral pitch of involute gears from 6—80 and 2—5 in inch and .5—5 and 6—12 in metric. • 14 leaves with ring holder. • Range of pitch: 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 36, 40, 48, 64, 80 • Pressure angle = 14.5°.