Z.-piece with lock for roller shutter key switch S.1/B.3/B.7 in polar white, matte finish. Switch program available in polar white glossy (similar to RAL 9010), white glossy (similar to RAL 1013), red glossy (similar to RAL 3003), made of duroplastic, scratch-resistant, and in polar white matte (similar to RAL 9010), anthracite matte (similar to RAL 7021), made of thermoplastic, shatterproof, and impact-resistant. Frames available from 1 to 5 modules, usable both vertically and horizontally. Square base shape with sharp corners with a 0.4 mm rounding radius, featuring a curved geometry and glossy or matte surface. Rockers/covers with a curved geometry measuring 55 mm x 55 mm with corners rounded at 0.4 mm. Installation devices are suitable for IP 20 / 21. Possibility of labeling partially through writable rockers/covers as well as with writable frames from 1 to 5 modules. Abrasion-resistant product labeling through printing. Illuminable according to workplace regulations. The materials used are halogen-free and UV-stable, surfaces are easy to clean and resistant to disinfectants. Over 200 applications.