When I tried to remove the bolt that was tight, the rod inside bent and couldn't return, so I couldn't use it all at once. I realized that I could only turn things that turned lightly.
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You can work while feeling the feeling of using the bolt firmly.
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I haven't used it often yet, but work efficiency is good because I don't have to replace the socket for nuts of different sizes.
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Everything seems to be understandable if you think about it ... heavy. Naturally it is heavy because the pins are buried. I didn't measure it specifically, but it's not much different from the multiple sockets I was using. The purpose was to reduce the weight of the luggage ... Difficult to use. It is difficult to insert a bolt, etc. while resisting the spring that pushes out the pin. The pin doesn't move far beyond imagination. It is difficult to understand whether the bolt is properly grasped, and the socket may not come off due to abnormal biting. It gets scratched. The object is easily scratched. It's useless.
(Translated by machine.)

It's great if the bolt gets in the way and doesn't reach the nut and you turn the head of the bolt. I made a mistake in using it.
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