the Quad Action Space Pen is the most versatile Space Pen in the Fisher product line combining a stylus tip with a mechanical pencil and pressurized ink pens designed to write in any environment. The Quad Action has a rubberized finger grip to provide excellent control. It"s barrel is a durable brushed chrome with a high gloss chrome clip and nose cone. The circumference is nice and hefty allowing you long periods of comfortable writing. Ink refills are available in black, blue and or red ink. The mechanical pencil has an eraser under the cap and takes standard 0.7mm lead.