After many years cracking finally broke, as I investigated variously as to whether cracks spread widely every day, after examining variously, the wooden mortar is cracked someday and I can not repair the conclusion. However, I could not give up and thought about various things and thought that it would be nice to tighten the mortar if cracks had spread, and when I was looking for fasteners on the net, I came to this part. I was worried whether it would work, but it was perfect. Just a tool to tighten is not a minus driver now is not it? After all it's a socket wrench. At least plus. But it is good because the crack managed to return.
It is convenient because it can make the length freely. Where we are using conditions, we want triple connection fittings now. Although metal fittings are sold separately, they are too expensive to feel expensive.