Similar to the original Shurhold Dual Action Polisher, the Pro features an XL, 21 mm orbit. The increased orbit and pad size make this a more powerful polisher. The unique dual action motion will protect your finish and give you the professional results you desire. 6" Quick change backing plate 2 Different ergonomic gripping styles EZ Change carbon brush ports Thumb controlled variable speed dial Locking on button Detailed user guide Canvas storage bag