Box spanner with a device for retaining the object to be turned

摘要

Box spanner (13) with a device for retaining an object to be turned, with an end (3) which can be connected to auxiliary turning tools and at the open end (4) an internal polygonal seat (5) which can mate with the polygonal body (11) of the object to be turned, provision being made that the polygonal seat (5) of spanner opening (K) is followed by a hollow space (2) which is delimited by the body of the box (1) and has a transverse width (D), and that, in the sides of the polygonal seat (5), the body of the box (1) has housings (9) which accommodate permanent magnets (6). <IMAGE>