On The Underside Of Our Cabinet In The House We Recently Bought, Built In The 70s. Plastic With Metal Teeth On One Side, Very Dull. Each Side Is ~4 Inches Long. What Is This Thing?

On The Underside Of Our Cabinet In The House We Recently Bought, Built In The 70s. Plastic With Metal Teeth On One Side, Very Dull. Each Side Is ~4 Inches Long. What Is This Thing? | Bored Panda