CNC Machined Billet Aluminum CaseClockable Motor Mounting (10 different positions)2 SpeedGear Ratios Pinion/Spur 14/64 = 4.57:11st gear = 3.47:12nd gear = 1.27:1Wide Steel 32 pitch gearsDelrin Spur GearSlipper Clutch DesignChangable Gearing OptionsCompatible With Other Brand Pinions and Spur Gears