To remove and install oxygen sensors and hex vacuum switches that are 7/8″ or 22mm in size on vehicles. 1x Socket 1/2″ Drive x 7/8″ x 50mm (L). 1x Socket 1/2″ Drive x 7/8″ x 80mm (L). 1x Socket 3/8″ Drive x 7/8″ x 30mm (L).