Stainless steel is used for making 

Correct answer: coins and medals.

Explanation: Stainless steel is hard, durable and highly resistant to corrosion and tarnish, so it keeps its shine and withstands handling and moisture—properties that make it suitable for coins and medals.

• Magnets – Most stainless steels (austenitic grades) are non-magnetic; magnets are usually made from special ferromagnetic alloys (e.g., steel, AlNiCo, Nd-Fe-B).
• Tools – Cutting/impact tools are typically high-carbon or alloy tool steels for greater hardness; stainless is less common.
• Moving parts of clocks – Traditionally brass or special spring steels are preferred for low friction and specific mechanical properties.