Buffing Mandrel Extension Creates better access to the insides of deep bowls. Fits the standard 3-3/4 inch Combination Adapter. It simply screws into the end of the Adapter, adding 3 inches to it, for an overall reach of 6-3/4 inches. Provides a strong and steady holder for bowl buffs or for 4 or 8 inch buffing wheels. Made in the U.S.A.!