• 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 heat 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.
• Satin chrome finished. Stored in lightweight plastic case.
• Product of China

Hole/bore diameter is determined by measuring over the two contact point with a micrometer or caliper.

Please Note: Photo showing micrometer used to calibrate/checking measurement of telescoping gauge is not included with this purchase.