Better check the plans carefully.
That's a powder coated part (PP) and probably important.
I believe it's a hinge bracket. Two each side different sizes.
Check again Larry...
HS-609PP are the spar doublers.
HS-411APP/BPP is the hinge bracket.
PP == Pre-Punched,
PC == Powder Coat (typ. in WD parts)
Just guessing from memory 7 years ago. 1100 miles from my plans. Cut me some slack. I've slept since Empennage. Still recommend holding on to them.
I received 2 of these parts in my empennage kit, I'm assuming it was a mistake. Was it? And if so does anyone need?