Features: APPLICATION — Compatible with GM 10 and 12 bolt, for Ford 9”, 7.5″, 8.8″, 8”, for Dana 30, 35, 44, 50, 60, 70, 80, for Chrysler 10 and 12 bolt 8.75. (See description for fitment chart) FUNCTION — This makes setting pinion depth more accurate and quickly. This tool is capable to measure many other Differentals you may just need a hub. MATERIAL — Bulit with precision and quality in mind. Made of superior material (aluminum alloy, steel) which have an unparalleled lifespan with great durability. Designed to meet your specific needs. .