Hit me hard and I will crack. But you'll never stop me from staring back. What am I? (Arkham City Riddle)

Question

need solution to the riddle in enigma conundrum batman arkham city

this is what riddler gave me

Hit me hard and I will crack. But you'll never stop me from staring back. What am I?

am staring at the wheels for hours but cant figure out the answer for the life of me

Answer 1

Mirror

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http://www.rarityguide.com/articles/articles/940/1/COMPLETE-Batman-Arkham-City-Enigma-Conundrum-Walthrough/Page1.html