What is a raised metal lip that is around a perforation?

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Multiple Choice

What is a raised metal lip that is around a perforation?

Explanation:
When metal is punched or drilled to make a hole, the cutting action often leaves a thin, raised edge around the hole. That raised edge is called a burr. It’s typically sharp and can interfere with assembly or safe handling, which is why deburring is a common finishing step. A rim is just the outer edge of a circle, a lip is any edge that protrudes, and a bead is a deliberately formed ridge for strength or decoration. The raised edge around a perforation is a burr.

When metal is punched or drilled to make a hole, the cutting action often leaves a thin, raised edge around the hole. That raised edge is called a burr. It’s typically sharp and can interfere with assembly or safe handling, which is why deburring is a common finishing step. A rim is just the outer edge of a circle, a lip is any edge that protrudes, and a bead is a deliberately formed ridge for strength or decoration. The raised edge around a perforation is a burr.

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