This incredible story was hand-written by Bob Knight and explains his thoughts and insights on the chair throwing game. This photograph measures 16x20 and is a Steiner Sports exclusive item. This is a one-of-a- kind piece and is a perfect addition for any sports fan. This Bob Knight autograph is Guaranteed Authentic by Steiner Sports and include a Steiner Sports Certificate of Authenticity and an accompanying tamper-proof Steiner Hologram. "The Steiner Seal Means It's Real.