US Patent 6931969 Adjustable spanner having a torque detection function

A adjustable spanner includes a main body having a first end formed with a handle portion and a second end formed with a drive portion having a fixed jaw, a movable jaw movably mounted on the drive portion relative to the fixed jaw, and a torque detection device mounted on the main body to detect a torque of the adjustable spanner. Thus, the torque detection device is mounted on the connection of the handle portion and the drive portion having a smaller structural strength, so that the torque detection device can detect the torque of the adjustable spanner exactly and sensitively.