Weiler 2″ Metal Adapters are for adapting medium and wide face brushes with a 2″ Arbor Hole to a 7/8″ Arbor Hole. Used in Pairs and Priced Per Pair. For use on CNC/milling/automatic machine, bench and pedestal grinders. For medium and wide face brushes. Used in Pairs and Priced Per Pair. For Adapting a 2″ Arbor Hole to a 7/8″ Arbor Hole. . .