Specially shaped crossbars allow the skein (hank) of yarn to slide off easily when made. Designed for easy skein removal. Dismantles easily for compact storage. My 3D printed Niddy Noddy is designed to make hanks quickly and comfortably. 1 wrap = 1 yard, so you can easily find out how much yarn you have when making your hank. It easily breaks down into two pieces to fit in your spinning bag, and is very durable. We recommend you not leave these in your vehicle for prolonged periods of time as the PLA material can warp with high heat or hot water.