Spark plug wrench

A spark plug wrench, including:

• a tubular body, defining an axis, including a working portion and a driving portion arranged along a direction in which the axis extends, the working portion having an axial dimension larger than an axial dimension of the driving portion, the driving portion being configured to be connected with a driving tool, the driving portion including a connection hole, the working portion including an assembling hole which is non-circular, the assembling hole including a first inner diametric dimension, the assembling hole being in communication with the connection hole;
• a socket base, disposed in the assembling hole, including a large diameter section, a small diameter section, a receiving hole and a plurality of receiving portions, the large diameter section and the small diameter section arranged along a direction in which the axis extends, the large diameter section having a first outer diametric dimension larger than a second outer diametric dimension of the small diameter section, the first outer diametric dimension being larger than the first inner diametric dimension, the large diameter section being radially abutted against an inner wall of the assembling hole, the receiving hole being configured for insertion of a spark plug, the plurality of receiving portions being transverse to the axis and inserted to the socket base;
• and
• a plurality of positioning units, each of the plurality of positioning units including an elastic member and a positioning member, the elastic member and the positioning member being received in the receiving portion, the elastic member urging the positioning member so that the positioning member at least partially projects within the receiving hole for being engaged within a grooved portion of the spark plug.