It is used to insert and withdraw long long screws. I was looking for it with an ordinary hex wrench because it was difficult to turn and I thought that an electric drill could be used. For the electric screwdriver it's better to have a slightly longer handle part, but at the moment I am satisfied.
I also catch even HEX holes that took licking. Since this patent of HEX - PLUS is held by WERA, it can not be imitated by other companies. Regarding the HEX bit, I can not think of anything other than WERA.
The bit which I used before was frequently broken, but the product of this time has sufficient strength, usability and work efficiency has improved. I would like to make it standard equipment in the future.