What's the purpose of the tiny pocket that comes on the denim

Have you ever wondered what's so useful about these 'rivets' on blue jeans pockets? - Quora

What is that small piece of cloth we see in pocket of men's coats? What is its usage? - Quora

What is the purpose of the little metal studs/nubs on the corner of some jean pockets? - Quora

Interesting Facts That Will Blow Away Your Mind - Corporate Review

Do smaller pockets on denim shorts give the affect of a small bum? - Quora

What is the purpose of a tiny pocket in the side seam of my shirt? - Quora

What is the purpose of biker denim? - Quora

What denim brands make the pockets on their jeans big enough to hold an iPhone? - Quora

Interesting Facts That Will Blow Away Your Mind - Corporate Review

What is the purpose of the tiny fabric piece that is included with every garment purchase at stores like Forever 21 and H&M? - Quora