Well designed and ergonomic, the Pentel Graph 1000 is a favorite among drafters and other professionals. All-brass, three jaw clutch mechanism gives excellent support for the pencil lead. Low center of gravity near the writing tip provides a feeling of enhanced stability and control. One click provides lead length equal to the diameter of the lead. Cleanly designed tip allows excellent view as you draw. Detachable pocket clip, shielded eraser, and an adjustable lead grade indicator. Made with 62% recycled plastic.