The 300MP pencil is a lightweight mechanical pencil. The plastic, hexagonal body facilitates fatigue-free writing and drawing and it prevents the pen from rolling on the work surface. The 300MP features a fixed lead guidance sleeve that prevents breaking and offers an unimpeded view of the page for precise ruler based drawing. 300MP pencils feature an adjustable lead hardness indicator and built in eraser. They are refillable with high-polymer HB leads.