I'm a genius! Not really, but I didn't have a bobbin winder and my mind got to thinkin'. I knew I needed something that turned. I have handed this drill to my husband a hundred times. Eureka! I gave it a try and it worked. I wouldn't recommend it to you since I don't know if it is proper in the spinning world, but since I was just winding up some practice wool, I thought it would suffice. What do you use to wind your fiber?