The Alltrade 648691 is a Oxygen Sensor Offset Puller. The offset oxygen sensor socket provides extra leverage for easier removal even in hard to reach spots. Its slotted design allows removing oxygen sensor with wiring harness attached. The 7/8 (22 mm) hex fits almost all oxygen sensors. It has 3/8 square drive for use with ratchet. Features: * Offset design fits in tight spaces * Fits most standard Oxygen sensors What"s in the Box: * Alltrade 648691 Oxygen Senso Offset Puller