SPI Internal Dial Caliper Gages
- Fast checking of internal dimensions
- Ideal for comparative I.D. measurements
- Easy to set with mikes or setting ring
- Rotatable dial with bezel clamp
- Graduation .001". ? Revolution counter
- Accuracy: .0015"
- Spring loaded arms and ceramic contact points for accurate measurements under constant pressure
- Push-button to close arms
- Dial reading .200" per revolution (2x .100"), except 20-970-0 long arm model features .400" per revolution, continuous reading
