| 摘要 |
a magnetic device is assembled with a square hole of a socket includes a base received in a connecting portion of the square hole, a magnetic element mounted to an end of the base. The magnetic element magnetically attracts a bolt received in a driving hole of the socket, and at least one expansive portion formed at an end of the base disposed opposite to the magnetic element. The expansive portion selectively hinders a connecting portion of the square hole of the socket. The magnetic device is received in the square hole of the socket without departing from the driving hole of the socket in an operating process. |
