Fowler 72-470-006-0 Telescoping Gage Set, 6"

Features:

• 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.
• Covers a measuring range of 5/16" to 6" with measurable depths of 4" to 5".
• Includes fitted vinyl case