Domical lead spindle whorl, from the Roman site at Newstead (Trimontium), 200 BC - 1000 AD
Use
Spindle whorls were used in the process of spinning wool into thread or yarn. A spindle (a straight stick or dowel) was inserted through the central hole, with wool wrapped around it. The whorl acted as a flywheel to maintain momentum during spinning. They occur in a variety of shapes and materials, and are often the only surviving evidence of spinning activity.