Spanner wrench for screwing nut, has elastic beak like structure penetrating into one of multiple grooves that are arranged in level setting ruler, where beak structure and grooves maintain ruler in opening in particular position

摘要

The wrench has an opening (4) traversing the wrench perpendicularly to a plane P, and a level setting ruler (5) penetrating into the opening (4). An elastic beak like structure (6) penetrates into one of multiple grooves (7) that are arranged in the level setting ruler. The elastic beak like structure and the grooves maintain the setting ruler (5) in the opening (4) in a particular position.