Carboy handles are known for causing stress, especially when full of wort, and can lead to snapping off the neck of your carboy. I have heard stories of the necks snapping off even when empty and it is not pretty. I suggest that you consider using something else, a carboy carrier or milk crate. I use a product called brew hauler which is made of polypropylene webbing. Makes it much easier to carry when full of my precious beverages or when cleaning and no stress on the carboy! Got mine for about $11. Your back will thank you and you might avoid slicing yourself up when that carboy explodes on impact after the neck snaps off.