Microsoft Surface Pen Stylus ($128.99)

Write and draw with precision ink on one end and a rubber eraser on the other. Tilt your Surface Pen to shade your sketches just like you would with a graphite pencil, using the pen tip that feels right.Sketch and shade with precision with 4,096 pressure points that respond to the lightest touch. Ink flows directly from the tip of your Pen to your screen with virtually no lag.