2 MILLIMETER PENCIL LEAD - These lead refills work great for your Mechanical Drawing Pencil or Lead holder sized for 2.0mm lead. | REUSABLE STORAGE CONTAINER - Leads come in plastic case for storage and portability. | DURABLE - Break-resistant composition prevents wasted lead and unnecessary frequent replacing. | WIDE USES - Suitable for all general writing applications such as notes, letters, and you can use it for office, classroom, home and other occasions | A PROFESSIONAL'S CHOICE - 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.