This Schumacher Racing Products factory replacement pinion gear is a 20-tooth, 48 pitch unit featuring a long boss design for secure motor shaft mounting. The long boss includes a set screw for reliable fixation on the motor shaft. Built from steel for durability, it is suited for 1:10 scale Schumacher CAT platform builds running 48dp gear setups. Features: 20 tooth count, 48 pitch Long boss design for extended shaft engagement Set screw included for secure motor shaft mounting Steel construction 7/7/26 cs