Knockout

A pre-scored or pre-cut circular opening in the back or bottom panel of a cabinet that can be punched out to allow passage of plumbing pipes, electrical wires, or gas lines. Knockouts eliminate the need to drill holes during installation and are strategically placed in sink base cabinets, vanity cabinets, and utility cabinets. They are covered until needed, keeping the cabinet sealed during shipping and storage.

Specifying this for a job? Captivating Pro members buy at 20–40% off retail and get cut sheets before rough-in.