My character always uses the wooden repair hammer.
The better repair hammers do not offer much other than "Action Hold Time".

While repairing my character's wooden structures, (with the wooden hammer of course)
I thought wouldn't it be good if the better repair hammers offer some kind of "buff" to the repaired structure.

Currently we have:
Iron Hammer - ( -5% AHT ) <slot available>
Steel Hammer - ( -10% AHT ) <slot available>
Platinum Hammer - ( -15% AHT ) <slot available>
Titanium Hammer - ( -17% AHT ) <slot available>

Why not add a special hp buff to wood stone or concrete when using better hammers?
Like this:

Iron Hammer - ( -5% AHT ) <slot available> adds 300 HP to wood
Steel Hammer - ( -10% AHT ) <slot available> adds 300 HP to stone
Platinum Hammer - ( -15% AHT ) <slot available> adds 400 HP and protection from 1 red zone storm phase.
Titanium Hammer - ( -17% AHT ) <slot available> adds 500 HP and protection from 2 red zone storm phases.

I may want to build better repair hammers with the "buffs" suggested above!

Please feel free to discuss or help develop a better idea for higher end repair hammers to make them more appealing to craft them.

With buff for hammers interesting idea! Because on current time for me nothing except wooden hammer not need, another hammer useless.
Idea with protection for 1-2 red (orange, yellow) zone storm phase for high level hammers is good.