Yarn Diz

This tool (diz) is used to restrict your spinning yarn to the correct diameter needed to spin. It includes 2 mm, 3 mm, 4 mm, …, and 12 mm through-holes. It also includes grooves designed to test the diameter of pre-spun yarn. The grooves are 2 mm, 3 mm, 4 mm, 5 mm, and 6 mm. 

Taken from https://www.bing.com/ck/a?!&&p=edfb07e175e6d02f4ab2e842bc0e94def512050c69b8d1ac064872246da982d4JmltdHM9MTc2MTUyMzIwMA&ptn=3&ver=2&hsh=4&fclid=2d6ac0ff-39a8-6135-2df4-d48538cf6057&u=a1aHR0cHM6Ly9zd2VldGdlb3JnaWF5YXJucy5jb20vd2hhdC1pcy1hLWRpei1hbmQtd2h5LWRvLXlvdS1uZWVkLW9uZS8&ntb=1: A diz is a small tool used in fiber preparation, particularly in spinning. It helps to remove a length of fiber, known as a "sliver," from wool combs or hackles, creating a smooth and continuous roving. The diz is typically a small disc or plate with a hole in the center, through which fibers are pulled to align them into a consistent strand, ideal for worsted spinning, which produces a smoother and denser yarn. Dizzes can be made from various materials and come in different shapes and sizes, making them versatile tools for spinning.