Detection tool

The utility model provides a testing fixture, which comprises a machine base, the machine base is provided with a groove, at least one end of the groove is provided with a detection port along the extension direction of the groove, and the extension distance of the groove is suitable for accommodating a piece to be detected; and the detection assembly is connected with the machine base, the detection assembly is provided with a detection end, and the detection end is arranged in the groove and is arranged opposite to the detection opening. According to the detection tool provided by the utility model, the detected piece can extend into the groove from the detection port along the extension direction of the groove, and the detected piece is detected through the detection end of the detection assembly in the groove, so that whether the length of the detected piece extending into the groove is a preset value or not can be known, and whether the detected piece is qualified or not can be judged. The grooves in the