Smoothest and Darkest Writing Superior Quality Lead for Smooth and Intense Dark Writing Perfectly Centered and Strong Bonded Lead Resists Breakage Instant Erasing with Rubber Tip Easy to Erase and Sharpen Free Sharpener Inside Leads have high graphite content which allows for uniform dark writing on paper Leads are soft and smooth, thus providing a longer and tireless writing expreience without applying excessive pressure Eraser Tip for quick, convenient and clean erasing on paper