With 50% more lead*, Paper Mate Write Bros. Precise Mechanical Pencils help you spend more time writing and less time at the pencil sharpener. The precise 0. 5mm lead makes these mechanical pencils perfect for detailed writing. Meanwhile, a smudge-free eraser keeps your writing clean. Finally, the #2 pencil lead makes these mechanical pencils ideal for standardized testing. They?re great for fast-paced home, office, and school use! *vs. lead volume of Bic Xtra Precision mechanical pencil