US PRO Tools 3pc Oxygen Sensor Socket Wrench Set 5586 Contains 3 most popular oxygen and vacuum switch sockets. 1 x Vacuum Switch Socket 3/8" Dr. x 7/8" x 80mm. Designed to remove and install oxygen sensors. Socket designed with slot which allows clearance of wire. Designed to be used with 3/8" drive tool or 1" wrench / spanner 1 x Heated Oxygen Sensor Socket 3/8" Dr. 7/8" x 50mm. Socket designed with slot in socket which accommodates the connectors on heat oxygen sensors. Socket has a double 1/2" for easy access 1 x Offset Oxygen Sensor Wrench 3/8" x 7/8" x 30mm. Low profile design for use in tight spaces. Designed to be used with 3/8" drive tool. Chrome vanadium steel,heat-treated for strength and durability. This high quality Sensor Socket Set comes to you brand new with retail packaging/tag