Retrofit outlet electrical box

A retrofit electrical outlet comprises an electrical box comprising one or more moveable braces coupled to linear brace actuators, whereby pulling on the linear brace actuator causes the brace to move toward the front end of the box to impinge a wall surface material between the brace and a front flange of the box. Releases may be included to allow for adjustment of the braces. The braces may move linearly or pivotally toward the wall surface material. The linear brace actuator may be stored within the wall for future use.