No. In addition to the design, the most important lock dimensions of a mortise lock are backset, spacing, nut size, length and width of mullion, type of mullion (flat mullion or U-mullion) and direction (left or right). Our competent specialised partners will be happy to advise you on all topics relating to aluminium front doors and ideal locking variants. The types of locking system of the fitting series heroal DF described above are only available from heroal fabricators and cannot be purchased elsewhere. Please use the specialist partner search to find a heroal fabricator near you quickly and easily.