Summers Brothers line of forged steel axles for ALL applications are manufactured to the same level of quality and strength as their axle lines for drag racing, oval track, and off-road cars. The shaft is machined from aerospace billet 4340 chromoly. Stepping up from the 12 spline stub shaft this is your heavy duty go big or go home set up! 

• Heat Treated 4340 chromoly stub shaft
• 31-Splines 
• Black oxide coating