What is the small hole in the casing of a Bic biro for?

i was able to install one new fan inside my casing but it doenst have any fan hole. so it's like the air is just from the inside. i do have 3 other fans with holes though.. but this one is just an extra fan, i added it for the lights that it came with...

Now that I have a hole in the side of my engine casing it rapidly leads a lot of oil, I've tried fixing it using Gun Gum and it never worked. I was going to try using Liquid Metal but quite sure that wont work either and it can't be welded... Do I replace...

Before you give me a lecture on safety, let me assure you that the bullet has been fired, and there is no powder or primer left in it. I work with shells a lot, but I've never needed to drill into a casing before, and I'm not sure exactly what to use...

its not a big big hole is there any way i can boge it with anything any tips would be greatful

im looking for a laptop casing for a gateway nv59c white i looked every were ebay only has the keyboard and top casing for the back of the the screen i want the hole casing... plzzz ...show more

If I'm writing notes with a Bic biro, whenever I underline something / sketch a diagram with lines, a ball of ink appears on the tip of the pen. Try it at home - take a ballpoint, draw a long line, and then look at the tip and you'll see a ball of ink...

I have 1998 Lexus GS300. The plastic casing is broken. This is a 3-hole black key. Lexus dealer wants $50.00 for it. I saw it on eBay for $9.00. Has anyone bought plastic casing? Does it work? It should be as simple as replacing existing key with the...

My friend always draw stuff on her arm or leg or hip or whatever with biro or a BIC pen. I've told her not to, but she keeps drawing on herself. Is this dangerous? Could it cause ink poisoning or skin cancer?