• 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°.