Extend the life of your pencils with this must-have tool. A sliding ring holds the pencil securely while you draw or write. Fits most round pencils and hexagonal pencils. Alvin has been the professional's choice for drafting tools and drawing supplies for over half a century. Since 1950, we have brought quality and value to our customers. Our tools help bridge the gap between ideas and innovations. We are known for our wide selection of high quality tools at a fair price.