These satin chrome plated gauges provide easy and accurate measurements of holes and slots
Two plungers under equal and constant spring pressure can be locked between the walls of a slot or across the diameter of a hole.
Final size is determined by measuring across the points of the plungers with a micrometer or caliper
Plunger tips are hardened and ground with radiused ends
Knurled knob at the top of handle is used for locking the plungers
Gauges have a satin chrome finish
Meets or exceeds U.S. Federal Specification: GGG-C-95A/26 Jun 1987
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