MECHANICAL PENCIL STAEDTLER GREEN 764 0.5MM
There's a real problem that affects almost all mechanical pencils—bear with us as we explain. As you use a regular mechanical pencil, the lead wears down on one side, forming a slanted wedge-shaped tip. Each time you put the lead to the page you end up using a different lead surface (pointy, flat, wide, thin) depending on how you hold the pencil. This can cause dramatic and unsightly variations in line thickness as you write or draw.