These wiring devices may look like piano keys, but they have features others don't. For starters, in all Piano devices, the mounting screws are hidden by the fixed upper and lower "keys." Next, the rocker-type switches can be wired as single poles or three-ways (fourway switches are not yet available) using side-wire or back-wire terminals. And finally, a single device can perform up to three functions in a single 2x4 wall box and up to four functions in 4x4 and 4x6 boxes. All of the common functions are available, including receptacles, cable and phone connections, slide dimmers, and GFCIs. The high-gloss plastic keys come in eight colors and are interchangeable. An anodized aluminum version, called Grand Piano, is finished in satin aluminum or