Abstract: A gauge for determining pertinent dimensions to which portions of die keeper pin assemblies are to be machined prior to insertion of the latter into a stamping die assembly. The gauge includes a body having a partial circular extension formed on one end thereof, a rod having one threaded end freely mounted through an axial passageway and threadedly connected to threads formed at the end thereof, a hole formed in the non-circular portion of the extension, a spring-loaded pin slip-fitted in the hole adapted to being secured in any axial position by threading the rod into engagement with the pin. The gauge is inserted through a passage formed through a wall of a stamping die body so as to position the pin in the path of a movable die pad, while the rod is out of contact with the pin. After the pad is caused to travel to its lowest position, urging the pin inwardly, the rod is threadedly extended into engagement with the pin to hold its depressed position.