Is this a safe way to store seed phrase?

I was thinking about how to safely store a 12 word seed phrase and wondered if this makes sense?

Get six stainless steel washers. Engrave them with four words each, and then store in three locations as below.

Location 1 Seed words 1-4 & seed words 9-12

Location 2 Seed words 5-8 & seed words 9-12

Location 3 Seed words 1-4 & seed words 5-8

That way no single location has the full phrase, but you could make the full phrase with any two of the three location’s washers.

Am I missing something or would this be pretty safe?