Forging a flint striker and a belt buckle at the same time

I forged a belt buckle which is a flint striker at the same time. It isn't very practical to make fire for this product, because you must open your belt first. But it works as usual belt buckle although it has extra operation. 

                                                  File.

Little forging.

Cutting little bit of file steel.

File steel bit and usual iron bar.

Forge welding. White powder is borax.

Forge welded stick and usual stick.

Riveting.

Normalizing.

Hardening

You can see that hardened part is lighter than other part.

Finished belt buckle.

And it works than usual flint striker...