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Using a hammer to break open an aluminum coil that is stuck closed is not recommended. Aluminum is a soft metal and can be easily damaged by blunt force. Instead, try using pliers or a screwdriver to gently pry open the coil. If the coil is rusted or stuck due to other reasons, applying a penetrating oil or lubricant might help loosen it without causing damage. Always prioritize safety and the preservation of the material when attempting to open or unstick objects.
