The Life-Saving Hole. According to an article published on The Independent, about 100 people die every year from choking on pen caps. You'll notice that BIC pens have hole at the tip of their lids. This doesn't only prevent it from leaking, it is also to comply with safety standards and reduce the "risk of children accidentally inhaling [them]."
This shit again?
again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again ...
#14 That hole is used to extract the key lock when the key is in it so you can rekey the lock to another key - you oil the lock through the key slot. That's where the pins are.