Ball Winder - from Knitters Pride
The Knitter's Pride ball winder is a must for any knitter or crocheter's supply cabinet! This hand-operated winder will turn hanks of yarn into tidy center pull balls. You'll likely want to pair it with an umbrella swift, though with care (or an extra set of hands) it can be used without one. This winder has a built-in table clamp that will work on table thickness up to 2.5" / 6.5 cm.
You may view a pdf of the full operating instructions here.