L-style Premium L-SHaft CARBON Lock Straight 190 's Japan Review

I had high hopes that they used metal for the core.
I returned it due to initial warping.

The initial defect was discouraging because it is an expensive product among the shafts.
I think it is out of the question that the product is not inspected at the stage of commercialization.

Even after resale, I will refrain from purchasing this product because I am concerned that it will warp or distort while in use.