The TORK C412HH spring-wound in-wall twist timer carries our legacy of innovation and quality with reliable timekeeping and consistent performance. Use twist timers to set a countdown for automatically shutting off appliances or lighting, saving you energy and trouble. No more forgetting to turn off a garage light or attic fan: with a twist timer, simply wind the knob to the correct duration and automate the process. TORK twist timers are at home in residential environments or a range of commercial applications, including hotels, bathrooms, locker rooms, pools or spas. For everything from kitchen vent fans to self-storage temperature controls, a twist timer switch can simplify your life. The C512HH is a SPDT switch that features a Hold function, secure commercial-style metal faceplate, twelve-hour maximum variable runtime, spring-wound knob, 12AWG terminal size and a voltage range of 125-277VAC. In addition, the entire timer fits inside a standard electrical box to make in-wall mounting a breeze. Trust in the reliable name of TORK, an industry pioneer since 1922, for all of your timer switch needs.