The original water pumps had bakelite (early type of plastic) impellers.
What you probably have here is a genuine Honda replacement pump.
The metal impellers are an improvement over the bakelite, I M H O
Ask if a microdisectomy can be done instead in your situation.
I chose a Nurosurgeon over the orthopedic surgeon.
Because choosing a microdiscetomy.
Gives one the ability to still BEND.
Fusing removes that option forever.