• Double action (self-centering) for quick checking of inside measuring.
• Rigid handle with self centering feature.
• Uniform contact pressures.
• Contact point ends are hardened tool steel and precision ground on a radius of the smallest hole the gage will enter.

Range: 5/16″-1/2″

1/2″-3/4″

3/4″-1-1/4″

1-1/4″-1-1/8″

2-1/8″-3-1/2″

3-1/2″-6″