Fowler High Precision 72-646-600 Telescoping Bore Gauge 4"- 12"

Bore gauges measure holes, or bores, in a workpiece. They can measure the interior diameter of a hole at any depth. X-tra Range Bore Gauge has a measurement range of 4 to 12" and gradient spacing of 0.0005".

Measures bores to a depth of 10" and has an insulated grip for extra stability.

Uses a two-point contact system for the detection of geometry problems such as ovality and taper, and carbide-tipped contact points provided extended wear and 'mproved abrasion resistance.