- Another great tool for easy and accurate measurements.
- Under spring tension, the plungers of the gage expand from the center to the size of the hole being measured and are then locked in place using the knurled knob.
- Final hole size is obtained by measuring over the contacts with a micrometer or vernier caliper.
- Contact points are constructed of hardened tool steel, precision ground.
- Double action rigid handle with self-centering feature for quick checking of inside measurements
- Constant spring tension for uniform feel
- 52-470-006-0 covers a measuring range of 5/16" to 6"
- with measurable depths of 4" to 5"
- Includes fitted vinyl case
