Circles of various sizes, factory-stamped into the sides of an electrical box, which can easily be punched out to form a hole through which wiring can be fed.
« Back to Glossary IndexKnockout
« Back to Glossary Index
Published on
by
Circles of various sizes, factory-stamped into the sides of an electrical box, which can easily be punched out to form a hole through which wiring can be fed.
« Back to Glossary IndexPublished on
by
