Why all cutting and piercings toos like saw, needles ,knives, scissors, naila, nut cracker, axes have sharp points or blades?

Why all cutting and piercings toos like saw, needles ,knives, scissors

1.	Why all cutting and piercings toos like saw, needles ,knives, scissors, naila, nut cracker, axes have sharp points or blades?
Answer» A SHARP point means lesser area and lesser area means we need not to press hard in other words PRESSURE GETS REDUCED.

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Why all cutting and piercings toos like saw, needles ,knives, scissors, naila, nut cracker, axes have sharp points or blades?

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