Features: 10Pcs Sensor Oil Pressure Sending Unit Socket Set Oxygen Injection Tool Set Remove Oxygen Sensors; Injectors; Oil Pressure Sending Units And Vacuum Switches. Heat-treated Chrome Vanadium And Chrome Molybdenum Steel With Black Oxide Finish Accepts Either 3/8 Or 1/2"" Drive Ratchet Depending On The Size of The Socket 10Pc Oxygen Sensor & Diesel Injection Oil Pressure Unit Vacuum Switches Socket Set Heat Treated Chrome Vanadium & Chrome Molybdenu .