wedge

A wedge is used to pull two objects apart.

For example when you cut butter with a knife

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Examples: Knives Forks Axes Nails Door Wedges

Knife

Fork

Nail

This mace is bladed or flanged. It uses a wedge to penetrate armor.

As you can see this is a wedge that is known as a hatchet. A hatchet is used to cut through trees and wood. The force would be the person's swing and the top metal piece is the wedge.