Aluminium can absorb strong forces without tearing or breaking. So, as a material, it provides a high degree of security. Due to the low unladen weight, even fire and smoke protection doors with glass inserts can be implemented with aluminium, expanding the number of possible areas of application. Therefore, connections with different system profiles can be made with the ALPRO hinge system while emphasising certain features for a harmonious appearance. An ideal combination of functionality and aesthetics, especially for heavy-duty and entrance doors.