To distinguish himself from his similarly suited military personnel, the Arkham Knight's suit has a distinct camouflage pattern to give him the image of a military leader invading an urban space.
The Arkham Knight has a tool similar to Batman's grapple gun, as seen in Batman: Arkham Knight #3, where he rappelled away from the Gotham authorities after they arrived at the site of the destroyed abandoned Arkham Asylum [REF].