This Schumacher Racing Products pinion gear features a long boss design machined from hard alloy metal, making it a durable factory replacement for builds running a 48 pitch gear mesh. The 42 tooth count suits setups calling for a higher gear ratio in that pitch. The extended boss provides a secure shaft engagement and includes a set screw for reliable motor shaft retention. Features: 48 pitch gear mesh 42 tooth count Long boss design for secure shaft engagement Hard alloy metal construction Set screw retention 7/7/26 cs