Current location - Plastic Surgery and Aesthetics Network - Plastic surgery and medical aesthetics - Some gel pens or ballpoint pens have a rubber sleeve and a pit on the handle. What is the reason?
Some gel pens or ballpoint pens have a rubber sleeve and a pit on the handle. What is the reason?
There is a simple reason. First, rubber materials can increase friction, and so can pits. Second, adding this set of circles will also make the pen more beautiful. If nothing is exposed, will it be too monotonous? In addition, the rubber is soft, so it will be more comfortable to pick up the pen.