Adjustable lap strap system

The object to provide a child safety seat with which the user is able to restrain and fasten a child in a child safety seat in a optimal way is solved by the child safety seat with the five point harness according to the invention comprises a two tongue buckle (1), whereby the two tongue buckle comprises guiding means (3) through which webbing (5) is guided and the webbing comprises stopping means to allow a predetermined length of webbing to run through the guiding means and retracting means (7) operatively connected to at least one part of the webbing.