Devil's advocate, two questions:

1. Do you need IT (kilt pin)

A: you think so, yes.

2. Is it necessary?

A: No

I have saved an amazing amount of money since I learned to ask both of those questions.

On kilt pins specifically, there is a user here, I think OCRichard that has been playing the pipes for a pretty long time in a lot of different bands. He has observed two things.

1. If you are wearing a sporran with a traditional two apron kilt, a kilt pin is not necessary to keep twig and berries covered up in fairly windy conditions.

2. If you are wearing a kilt pin it will eventually catch on something and make a smaller or larger tear in your (likely quite expensive) kilt.

I read his posts over and over in threads similar to this my first few months here. I believed him, but I was feeling lucky.

One day I got my one kilt pin stuck in one drawer handle without noticing one time. I pulled only one thread in one kilt that one time, the smallest hole possible. I haven't worn a kilt pin since. To date my really nice (>$500) tank has never yet been subject to a kilt pin.

A pulled thread is not repairable. You will see it for the rest of the life of the kilt, whether or not anyone else ever notices it.

Lots of folks wear kilt pins and I don't mean to sound preachy. Kilt pins are cool, they are traditional, and they are a legitimate avenue of self expression. More power to you.

Personally I would rather do without than take the risk of possibly wrecking an expensive garment. You might think you need one, but kilt pins are not neccesary.