Plastic Barrel Spanner A plastic, two handled spanner for use with 4" wide neck wine fermenters and King Keg barrels. This may be either black or white. £2.49 Sorry, this item is currently out of stock. If you wish to pre-order it, you can contact us by phone or email and we will reserve it for you from our next delivery. A plastic, two handled spanner for use with wide neck wine fermenters and brewing barrels to make it easy to remove the 4" cap.It is not suitable for use with standard 2" necked barrels.