The installation of stainless steel Stairtec SWP and SWR buttons may take place either off-site or on-site by simply pre-drilling holes at 70 mm on center. In detail: When installed on wood, simply drill a 6.5mm hole and insert the button, pushing it into place. When installing it on marble, stone or ceramic, drill a 7mm hole and fasten the button with an adhesive suitable for the surface. This product is designed for stairways, as decoration or as an anti-slip device (the button has a knurled surface). Alternatively, it can be used as a tactile button on flooring, to indicate areas or pathways.