This is the Pro-Start Handheld R/C Car Engine Starter from Team Associated. FEATURES: Automatic overload cutoff protects the starter if engine is flooded 6mm hardened steel hex shaft Can be used with any engine equipped with 6mm hex backplate Quick release chuck for quick shaft attachment and removal Shaft storage on side of starter INCLUDES: Starter, hex shaft and instruction sheet REQUIRES: Battery: 6-cell sub-C stick pack with Tamiya type standard connector, DTXC2010 Battery Charger jxs 3/19/08 ir/jxs