Knock type whiteboard pen. I like using phones and things in one hand and pen in one hand I like it a lot since I used it from the front model. I can not feel the improvement of the new model just by using a little. However, it is definitely somewhat too thick that the whole (not the pen tip) became thick. Because the whole is the same thickness, it makes a thicker feel than a famous certain thick pencil. A little consideration may be necessary when a small hand of a hand uses it.