| 摘要 |
In a screwing element (1) for accommodation of a fastener head (5) of a fastener (6) there are provided jaws (3, 4) for seizing the fastener head. The jaws (3, 4) can be axially inserted into or withdrawn from the holder (2), wherein the jaws in the withdrawn position can be pivotably forced apart into open position. At their free end the jaws are provided with incisions (15, 16) and, adjoining these, with gripper-like parts (17, 18) jutting outwardly toward the central axis for the purpose of engaging mechanically and/or frictionally with the fastener head (5) from behind.
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