【Efficiently Make Yarn Cake】The yarn winder can efficiently help you make neat and compact yarn cake (max 3.5 oz/100 g), saving you time and storage space for easy yarn sorting and storage. The yarn ball winder makes boring winding more fun and efficient and saves your scrap. Note: It is best with worsted weight yarn (size 4 or less), didn't work as well with blanket yarn (sixe 6-7) 【Easy to Install】The yarn winder for crocheting requires only 4 steps from installation to use, quickly start your knitting journey. Easy to install, reducing your installation woes. Comes with a detailed full-color instruction manual to get you started with the y