This is an upgraded steel "Short" driveshaft for you custom Axial build or the rear axle on the Ground Pounder monster truck. These all-steel driveshafts feature a 5mm output shaft size along with a hex-shaped slip joint that's far superior for handling hi-powered brushless setups.  This kit includes 1 male and 1 female driveshaft half, plus four m4x4mm set screws. 

Note:  If running a 12" or 12-1/2" wheelbase kit on your SMT10, these are the driveshafts you need instead of the longer version.

Collapsed Length:  3-1/4" (82.5mm)      Extended Length:  4-1/4" (108mm)