Oh no! Did you wear a hole in your favorite socks?! The Jawoll Reinforcement Bobbins are a great way to increase durability in the toes and heels of your handmade socks. All you gotta do is knit this thread into high-impact areas of your creations to add support and durability. Each bobbin weighs 5 grams and is approximately 43 yards. You can also view all Lang Yarns Jawoll Reinforcement Bobbins.