Sensor Socket Set, 8Pc 29 mm Vacuum Switch and O2 Socket, 1/2 Drive (OTC-4673-1). 7/8 Vacuum Switch and O2 Socket (wide slot), 3/8 Drive (OTC-4673-2). 27 mm Thermal Sensor Switch, 1/2 Drive (OTC-4673-3). 7/8 Vacuum Switch and O2 Socket (narrow slot), 3/8 Drive (OTC-4673-4). 1-1/16 & 1 Oil Pressure Sending Unit Socket, 3/8 Drive (OTC-4673-5). 7/8 O2 Sensor Socket offset 1/2 Drive (OTC-4673-6). 7/8 O2 Sensor Socket (low profile), offset 3/8 Drive (OTC-4673-7). 1-1/16 and 1 Oil Pressure Socket (short access), 3/8 Drive (OTC-4437-8) 4437 No -