Central piece with lock for roller shutter key switch Q.x in aluminum with a matte finish. Switch program made of durable plastic, scratch-resistant, in polar white color (similar to RAL 9010). Frame available in 1 to 5-gang, usable both vertically and horizontally. Square base shape with rounded corners featuring a 4 mm radius, with flat geometry and a velvety surface. Rockers/covers with edge lengths of 58 mm x 58 mm and rounded corners with a 2 mm radius. The socket central pieces and many other central pieces create a flush surface with the frame. Installation devices can be used with a separate sealing kit for water protection UP IP 44. Possibility for labeling with writable frames, available in both vertical and horizontal orientations, from 1 to 5-gang. Abrasion-resistant product markings using laser technology. Illuminable according to workplace regulations. The materials used are halogen-free and UV-stable, the surfaces are easy to clean and resistant to disinfectants. Over 270 applications.