BoxWave TwistGrip Pen Capacitive Asus Transformer Book T100 Stylus - Fiber Tip Capacitive Touchscreen Stylus w/ Retractable Twist Ballpoint Pen and Ergonomic Rubber Grip Barrel Design (Poetic Purple) Works on all capacitive touch screens Integrated ballpoint pen, perfect for taking paper notes Functional pen clip and twist grip Durable aluminum and rubber construction with replaceable ink Available in Crimson Red and Poetic Purple colors