The Smartbox 1-gang, round polycarbonate electrical box features a built-in hole saw and shark-tooth mounting tabs. Designed for fast, accurate installation in retrofit applications (e.g., ceiling lights, smoke detectors), it includes four knockouts, supports fixtures up to 6lbs, and offers a generous 1618cuin capacity, in one compact, code-compliant design. It is a retrofit electricians dream, automatically cutting its own hole and locking in place, to deliver fast, accurate, and professional installs without the usual hassle.