Why Do Electrical Prongs Have Holes in Them?

Why do some electrical prongs have holes and some do not? - Quora

Why Do Electric Plugs Have Holes in the Prongs?

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Why Do Electrical Plugs Have Holes?

Why do Electric Plugs Have Holes?

Electrical Plugs Have Two Holes - Here's Why

My heater's plug did this, is this safe to use still (should I

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Why Do Electric Plugs Have Holes? Answered

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