• 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 0.5 - 5 and6 - 12 in metric • 7 leaves with ring holder • Range of pitch: 2, 2-1/2, 3, 3-1/2, 4, 4-1/2, 5 • Pressure angle = 14.5°