Hey RC crawler fans, if you want to beef up your Axial SCX10 II or Capra's axle, this heavy-duty bevel gear set is a solid upgrade. It includes a 30-tooth reverse rotation bevel gear, an 8-tooth input shaft, a keyed differential locker (spool), plus all the needed hardware (E-clip, M2 screws, washers). Everything's made from hardened steel for maximum strength and durability—no more worrying about stripping gears. The keyed spool design gets rid of the weak M2 screws and the tolerances are tight, which means less slop and better power transfer in your drivetrain. It fits the Axial AR44 and AR45 stock axles, and the Capra Currie F9 portal axle. Installation is pretty straightforward if you're familiar with your rig. Comes with a 12-month warranty. A great way to add reliability and performance for serious crawling.