Here is the Mittler tool, with the 11⁄2-inch mandrel bar and the adapters. The kit comes with all the center supports for 9- and 8.8-inch Fords, 10- and 12-bolt GMs, ’57–’64 Olds, as well as Chrysler 83⁄4 and the Dana 60. The small adapters are the center supports that fit inside the main caps. The larger adapter is used to position the housing ends. The flat plate establishes the pinion centerline and is used as a convenient locator for checking housing-end position.