It is the professional freehand tool and the standard pen for the Intuos4. The Grip Pen is equipped with a waisted rubberized grip area that reduces gripping power by up to 40%, relieving stress and alleviating writing fatigue.It enables you to work even more ergonomically. The optimum weight, the perfect balance and its tilt sensitivity making it the most natural freehand tool designed for extensive use. It is the must have for professional users.The Grip Pen is equipped with two customizable side-switches and a pressure-sensitive eraser. It includes replacement nibs. This means, you are getting four different pens in one! The Grip Pen is equipped with the double side switch and the pressure-sensitive eraser. It includes replaceable pen nibs as well as a stroke nib, a flex nib and three felt nibs. This means, you are getting four different pens in one!