This keychain is laser cut from .125″/3.175mm thick 304 Stainless Steel. This is a very high quality, non magnetic, non corrosive and unbreakable material that should last a lifetime.
The outer dimensions (including the keyring hole) are 3.11″/79mm long and .78″/20mm wide. The design is laser engraved on both sides and it comes with a 1″/25mm keyring.