With 50 percent more lead these Write Bros. Strong Mechanical Pencils help you spend more time writing and less time at the pencil sharpener. Slim design is built to handle demanding classrooms fast-paced offices and beyond. The No. 2 lead is preferred for standardized testing and great for school lists. Smudge-resistant eraser keeps your writing clean. Plus the strong 0.9mm lead is stronger for less breakage.