A recent sad fatal accident in Queensland, caused by lack of a second, visual method of securing the passenger's door of a car with forward opening doors, led me to fit these safety latches. One size fits all, they are 'handed'. Setting up and drilling the mounting screw holes involves a 'moment of truth' - to drill or not to drill - but the result can be unobtrusive and reassuring. These latches make a quick visual cockpit check prior to take off somewhat simpler. I fitted them to both doors of my 2.6 LB6 DB Lagonda DHC 1948 recently. In one of the pics, a latch is not correctly closed. See if you can spot it. I obtained them from Woolies Trim in the UK via the net. Good people to deal with.