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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When it is used for the first time, when applying grease to the screw thread, it becomes to rotate smoothly, and if you become familiar it can be quickly turned with one finger. Finally I tightened it with a 17 mm wrench to a quack but I could fix the dent without screw hole becoming useless. Thread threads may be exhausted in the future, but as for the jaw part it is forged, so I do not think it will deform with the wrench tightened up. Maximum opening had a margin about catalog value + 10%.