Specification: 100% New and High Quality 1 Year Warranty Type:Oxygen Sensor Socket Set or Single Item:Set Material:Carbon Steel Number of Pieces:7 Drive Type:6 point,12 point Size:22mm,27mm,29mm Set contains seven most popular oxygen sensor sockets to work on a variety of vehicles. Facilitates the removal, inspection or replacement of heated and non-heated Titania and Zirconia oxygen sensors found on most modern vehicles. Windows and slots enable sockets to be fitted over wiring harness. Features: .