This is a 24 tooth 48 pitch pinion gear. This is the gear that attaches directly to the motor shaft. Steel construction One 24T 48P pinion gear One 4-40 set screw Installation onto 1/8" standard motor shaft. This pinion can be used on many vehicles or other applications requiring a 48 pitch pinion gear. See subs for pinion gears with a different number of teeth. cmc 01/10/02 &