Convenient pen / Pen

Many times , you maybe forgot to put the tap back to the pen or pull the head back , which caused to broken the refill or dirty your pocket .

The "convenient pen" , whose head would appear only the button is pressed and , pull back automatically when your hand go away from it , which is avoided breaking or smudging .

Meanwhile, it can simplify the spelling time and become the initial way to spell—specify the pen , and write .