Folds to save space in your trunk and locks into place for easy use. Push button in center allows wrench to fold after use. Sliding arms give extra leverage for removing lug nuts. Made of heavy duty and durable alloy steel. 17mm, 19mm, 21mm sockets, and 1/2 square drive adaptor to be used with other sockets. 16 in lengthWarning: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer.