Thunder Tiger 3801 Hex Starter Probe Rptor

This tool is special designed to start nitro engines. Normally, it is used on nitro powered helicopters like the Raptor series or more recently, it can be used to start a shaft starting type Nitro engine (Like TT "K" series engine). To use this tool to start an engine, you have to use a special R/C electric starter device and battery. The 6mm ball size is fit with most of the nitro heli engine starting coupler.