Precise  2"-3" x .0001" DISC MICROMETER

• Measures root tangent length of spur gears and helical gears.
• For measuring narrow grooves & other recessed features from 0.03" thick.
• Discs are .787" in diameter, 0.3" thick at the edge.
• Measuring discs are hardened , ground and micro-lapped for greater accuracy.
• Positive locking clamp with ratchet stop.
• Satin-chrome for easy reading.
• Supplied with fitted case.