Kuru Toga 0.5mm Mech Pencil

grabcad

I recently used Solidworks to analyze a drawing tool, which I find very efficient. However, I noticed that its eraser is quite short, so it doesn't last long. Despite this, I consider it a good writing instrument. You can purchase it for $10 from this link: http://www.amazon.com/dp/B004OHNR0A/. As a side note, there isn't an internal mechanism for advancing the lead in this pencil as it is difficult to disassemble. Please keep that in mind.