Small Hole Gauges

Ideal for measuring small holes up to ½"such as valve guides

Knurled knob at end of handle is used for size adjustment

Hole size is obtained by measuring over the contact points with an outside micrometer.

Gauging surface is a full-round with a flat bottom; permits use in the smallest of shallow holes, slots and similar work.

Complete Set of Four Gauges - Includes Fitted Case