This is the Locked Axle Set for the Axial Scrpion Rock Crawler. FEATURES: Strong composite plastic housing Aluminum diff locker with hardened steel axles and drive shafts Designed for maximum ground clearance 38 tooth aluminum bevel gear INCLUDES: Unassembled Locked Axle Set with servo plate, bearings, bevel gear and instruction sheet REQUIRES: Installing on Rock Crawler following instructions in manual jxs 12/18/07 ir/jxs