Central piece with lock for the K.5 venetian blind key switch made of stainless steel. The switch program consists 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 versions from single to five-gang, with various design options for vertical and horizontal mounting. For horizontal mounting of multiple combinations, a frame bridge is not required, allowing for narrow gap dimensions between the rockers and central pieces. The rectangular basic shape features sharp corners and edges with a rounding radius of 0.3 mm. The geometry is flat and the surface is glossy. The rockers and covers have dimensions of 56.5 mm x 71.5 mm and also feature sharp corners and edges with a rounding radius of 0.3 mm. Some installation devices with a separate sealing set are water-protected (UP IP 44). Labeling is partially possible through writable rockers and covers. The products are abrasion-resistant, marked by printing, and can be illuminated according to workplace regulations. The material used is halogen-free and UV-stable, and the surfaces are easy to clean and resistant to disinfectants. Over 200 applications.