Fisher Space Pen Cap-O-Matic with Stylus, Black (775/S) Conductive Stylus is ideal for touch screen cellular smart phones and tablets Writes at any angle, even in Zero Gravity. Simply the most versatile pen ever made. Writes in extreme temperatures from -30F to 250F Each Fisher Space Pen is precision assembled, hand tested, and carries a lifetime guarantee against all manufacturing defects All Brass and steel construction