Purchased for bolts at the back of the crankcase.
The degree of freedom of the insertion angle is small, but the hexagonal corner is more difficult to lick than the 12 corners.
KTC likes it because the plating is solid.
I purchased it to operate the sleeve nut without removing the axle nut by adjusting the tension of the super cub. I searched in five neighborhood home centers, but why 9.5 square 23 mm is not in all store inventory. I should have ordered from the beginning with a monotaro.
It is absolutely necessary when tightening the screw which the bolt screw has come out for a long time. It is effective for work such as intentionally destroying the bolt nut that was fixed and removing it.