Product Description: 1. Application: 6602 Differential Bearing Preload Wrench Fit for Chrysler for Dodge Vehicles with 7-1/4, 8-1/4, 8-3/4, and 9-1/4 Rear Axles 2. Function: It helps remove the adjuster nuts when servicing the subject rear axles.This tool is able to loosen the differential bearing adjusters inside the housing through the axle tube ( you need to use with socket). 3. Material: Made of high quality high standard steel and black powder coat finish with high strength and toughness for durability and perfect match. .