The heavy weight, 6-sided barrel houses a smooth writing Soft-Roll ballpoint at one end and an ultra sensitive touch screen stylus at the other. Under the stylus top are phillips and flat head screwdrivers, while on the barrel are a built- in level, ruler and 3 different scale functions. The chiseled spring clip will hold the One Touch Tool pen securely in your pocket, ready to handle more jobs than any other pen! For those who like the freedom to use their favorite ink cartridge but like the convenience of a roller pen, the Tool Pen is now available in ink-ball as well.Ballpoint pens fills with Monteverde D1 refills (choose Medium or Super Broad) Fountain pen and Ink ball fill with Monteverde standard international G3 ink cartridges (included). Pencil fills with standard 0.9mm leads. The mechanical pencil version of the Tool Pen features 0.9mm lead and an eraser conveniently stored inside the barrel, but with no level.