Custom Handweaving Wraps Per Inch Gauge was especially designed to meet spinner's needs. It has 2 wraps per inch notches, a hole in the upper left for a ribbon or yarn to hang it on wheel, A hole in the middle for a Diz, Angles of Spins and sample yarn sizes in outline form to check what you are spinning now versus an half hour ago, our contact information and logo. Made from sturdy acrylic plastic. They make great gifts for spinning friends!