This is an App version of our best-selling printed pocket guide on Geometric Dimensioning and Tolerancing (GD&T). In its 77 pages it will give a description of GD&T symbols and their use on engineering drawings. Common inspection techniques and reporting methods are also included in the descriptions.

There is a conversion app for XY rectangular measurements to position tolerance zones.
There is a fixed and floating fastener formula App to calculate position tolerances using standard screw and drilled clearance holes. Available in both inch and mm.