The series of side-hung door fittings are suitable for aluminium profiles with Euro groove (sash 15/20mm, frame 14/18mm). Security, safety, liability, lifespan, environment protection, easy installation and adjustment, aesthetics are fundamental requirements for entire process of design, and choice of materials and processing technologies. There are 4 kinds of solutions, single-leaf with mortise lock, single-leaf with multi-points lock, double-leaf with mortise lock, and double-leaf with multi-points lock.