Double-Sided Adapter to Fit Multiple Seal Sizes. Hollow adapter allows driver to slide over shaft to drive seal. Neodymium magnets on both driver faces hold seal in place until you are ready to drive into place. Adapter is double-sided for different sized seals. Works on many applications, especially Ford pickup and SUV pinion seals. Can also be used on standard seals. Tool is made from aluminum to make it lightweight and allow more driving power to transfer. Metal cap is replaceable.