An excellent tool for any architect, engineer or designer, the heavyweight (1.5oz), 6-sided barrel mechanical pencil version of the Tool Pen features 0.9mm lead, an ultra sensitive touch screen stylus and an eraser conveniently stored inside the barrel. Under the stylus top are Phillips and slotted head screw drivers, while on the barrel is a built in ruler and 3 different scale functions. The chiseled spring clip will hold the One Touch Tool Pencil securely in your pocket, ready to handle more jobs than any other pencil.