I thought things were not good because the fixation was sweet,
It was able to adjust by the tightness of the screw.
I think that it was even better if there was an installation manual.
Metallic burrs are on and I felt cheesy for the price.
The welded part of the base was separated at the time of installation at what was first delivered. I got in touch with the replacement correspondence soon. I think that it is a movable type and strong for falling is selling, but worrying about strength.