【Fit】GEAR Shaft fis6631 ["Slim"] ["Spin"] 1 (13.0mm) Clear 's Japan Review

This is the first time I bought a slim shaft.
It is so thin compared to the normal one that I thought the nub might break.
The shaft is very elastic.
The threaded part is very hard to loosen. The flight part also fits tightly, so no stress.
No complaints.