These high-quality lead refills always produce smudge-resistant, clean marks and sharp lines, making them perfect for everything from architectural drafting to school work. Enhancing their value for both busy professionals and students, both the leads and erasers are packaged in convenient clear tubes, so it's easy to tell, at a glance, when more are needed. Plus, since these refills are made specifically for point-loading Bic® Atlantis®, Click Master™ and Velocity® pencils, when you use them, you can be sure that your favorite pencils will work as if they were new, again. Take care of all of your pencil refill needs at once with this unique lead and eraser pairing package. Lead Degree (Hardness): HB; Lead Color: Black; Refill(s) For: Atlantis, Reaction, Velocity and Quantech; Lead Diameter: 0.7 mm.