Reduction of Area Gage 

Here is an easy, quick and accurate way to measure the reduction in diameter of a test specimen for simple conversion into cross-sectional area. The reduced section of the specimen is measured between hardened steel contacts.

The Olsen Reduction of Area Gage reads in increments of 0.001 in. It has a throat depth of 1 in., and can be used for reduced sections up to 11/16 in.

P/N: 90002413 - Point type
(0.005 inch radius, measuring range 0.686 inch)
P/N: N/A - Point type - metric
(0.005mm radius, measuring range 0.174 mm)