This is the replacement Knuckle Arm Set for the Duratrax Evader EXT FEATURES: Nylon construction, black in color Replaces worn or damaged knuckle arms INCLUDES: One Left Front Knuckle Arm - key number 24 One Right Front Knuckle Arm - key number 25 REQUIRES: Installation following the model manual COMMENTS: For the front hub carriers order DTXC8039 For the front axles order DTXC6172 For the kingpins order DTXC8199 kpm11/15/2007 ir/jxs