Telescoping Gauge Set 8-150mm Internal Diameter Bore Gauge Telescopic hole gauge

Features:

√ Double action rigid handle with self centering feature for quick checking of holes, slots and recess up to 6" deep

√ The ends of both contact are head treated stainless steel and precision ground to a radius to allow proper clearance on the smallest hole the gage will enter

√ Constant spring tension gives uniform contact pressure

√ Handles are rigidly attached to the contact plungers and are automatically self-centering

√ Chromel-plated finished

Application：

√ Under uniform spring tension, the plunger of the gage expand from the center to the diameter of the hole or width of slot being measured and then locked in place by a knurled knob, the hole size is found by measuring over the two contact point with a micrometer or caliper