FASTRAX ROTO START WITH HYPER 21 PLATE

Start your nitro R/C engine effortlessly using this new Roto Start with powerful 550 motor. Insert the 6mm shaft with hexball tip into the new Torque-Slip design backplate receptacle to start your engine. The torque slip back platefeatures a specially design slip unit to avoid possible damage should the engine lock up. Two different back plates are available for HoBao Hyper 21 and SH/Force engines. Please Note: This item is not compatible with the new HoBao Cops design of pull-start engines.