Vehicle applications include: Jaguar F pace, XE, XF (2015 onwards). 

Land Rover Discovery Sport, Range Rover Evoque (2015 onwards)

For locking the engine into the timed position so the engine timing chain can be removed/replaced and the engine timing checked. 

Tool should be used with a fuel pump locking tool

Engine codes: AJ-200D, 204DT, AJ200D, AJ200, 204DTD

OEM NO.:JLR-303-1635, JLR-303-1636, JLR-303-1630