Created directly from the digital files used in the creation of the Arkham Origin game comes this exact replica of Batman's signature gadget, the Grapnel Accessory. Over 11" in length. 1 Articulated Hook Attachment. Motorized Spool Allows Rope to Extend and Retract. Battery Powered. How it functions: Squeeze trigger and the Grapnel Accessory launches the Hook Attachment several feet into the air! Activate slide switch to retract the rope back into the housing spool concealed inside the weapon.