Very high quality THK brass spring snaps, there are 3 colours you can choose.
Gold: Real gold plate.
Silver: nickel plate.
Antique brass plate.
This is the best quality snap in the market I think.
This link is for 12.5mm one, there are two kinds, one is used for ourside, and the other is used inside(look at the pictures carefully)
4 parts as one piece, 144 pieces as one packet, we don't sell separately.
The install tool is here: https://www.leathercraftpattern.com/Leather-supplies/snaps/THK-snaps-install-tool-kit