Most People Have No Idea Why There’s a Small Hole in a Padlock Key—Do You?

3. Reduces Weight
Even a tiny amount of removed metal helps reduce the key’s weight, especially when carrying multiple keys.

4. Improves Handling
The hole provides a better grip when turning or pulling the key from a lock.

5. A Small Detail With a Big Purpose
What seems like a simple design choice actually makes the key more practical and convenient in everyday life.