Description
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

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