Central piece with lock for roller shutter key switch K.5 Aluminum. The switch program is made of thermoplastic, is shatterproof and impact-resistant, and is available in polar white (similar to RAL 9010) or matte anthracite (similar to RAL 7021). The frame is available in 1-gang to 5-gang configurations, with various design options for vertical and horizontal mounting. In horizontal mounting of multiple combinations, there is no frame bridge, resulting in narrow gaps between the switches and central pieces. The rectangular base shape has sharp corners and edges with a rounding radius of 0.3 mm. The geometry is flat and the surface is glossy. The switches and covers have edge dimensions of 56.5 mm x 71.5 mm and also feature sharp corners and edges with a rounding radius of 0.3 mm. Installation devices can be partially used with a separate sealing set for water protection (UP IP 44). Labeling is partially possible with writable switches and covers. The products are abrasion-resistant and marked by printing. They are illuminated according to workplace regulations. The material used is halogen-free and UV-stable, the surfaces are easy to clean and resistant to disinfectants. Over 200 applications.