In her hand she holds the distaff and grasps the spindle with her fingers. — Proverbs 31:19
I have a number of friends who are yarn junkies and several who have spun their own yarn from fiber so this is a bit of a fun passage for me. Most of them have their own spinning wheels and ball winders which I imagine makes this easier. For flax, however, the process is different. You tie the flax fiber onto the distaff and wind it onto a drop spindle held in the other hand. Pictures can be found here.
I think in the spirit of the passage, it means that the virtuous woman/woman of valor makes her own fiber which is then used to make clothes but it illustrates an interesting principle. Fiber by itself is fairly weak — you can pull it apart easily. However, once one spins it into thread, it becomes much more difficult to separate. It can be pulled through cloth as sewing thread or woven into the cloth itself (making it even stronger).
Like the fiber, we are weak just by ourselves. However, we become strong when we are all woven together into the thread of community. It is quite easy to break just one person but in the community, all of us hold the others up and we are better able to weather the things life throws at us.