This is the Case for Backplate Unit for the optional Roto Start for the HPI Savage. FEATURES: Black nylon construction _ YOU WILL RECEIVE: One nylon Backplate unit with pressed bushing. One 2mm allen wrench Three 2.6 x 12mm socket head cap screws. Two 2.6 x 8mm socket head cap screws REQUIREMENTS:Roto Start unit and some disassembly of engine. COMMENTS: For use with Roto Start only. wm 5/20/03 ir/jxs &