[How to use]:Extend the gauge into the hole or recess to be measured, lock it into place and remove it, using a micrometer or caliper to determine the final hole size.
[High-quality Telescoping Gages]:Product surface chrome plating, bright surface, long service life
[High Precision]:Constant spring tension produces uniform contact pressure for more accurate measurements
[Package Included]: 6 pcs telescoping gage with a storage box,easy to maintain and store.