A yarn swift is a device that holds an untwisted hank of yarn and rotates in a circle while the yarn unwinds into a ball. Hanks of all sizes can fit due to the adjustable center that expands or detracts the diameter. A swift works well with the assistance of a ball winder.
Such a simple contraption can make the biggest difference. Keep reading to find out how swifts prevent yarn from tangling and how they make rolling balls of yarn a smooth process, even if they are not a necessity.