Feature APPLICATION: This pinion depth checker kit is designed to work on most differentials. Such as compatible with GM 10 bolt & 12 bolt and early GM «B»,»P» and «O» and GM 9.5, 10.5, 14bolt. For Most Dana axles up to Dana 70. For Ford 7.5», 8.0», 8.8», 9.0». Fit for Chrysler 8-3/4». FUNCTION: The pinion depth checker kit is a very accurate method of setting pinion depth in a large number of automotive differentials. Alternative for T&D Machine Products 11001 Deluxe Pinion Depth Checker. .