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Due to Japanese national holidays as Golden Week, we will close 2019/4/27~2019/5/6 JST.
This may cause delays with our responses. Thank you for your understanding.
This product is manufactured in Japanese standards. Please check the specification before you order., This product is manufactured in Japanese standards. Please check the specification before you order.
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We are tightening again with a hexagonal wrench, but this product is less than 0, 3 mm in dimensions of the hexagonal diagonal compared to those of other manufacturers, the wrench will slip.
As you use it will have rounded corners and will not be usable.