Traxxas 6828A Differential output yoke assembly, extreme heavy duty (2

Very common shaft for most Traxxas 4×4 vehicles see below for fitment 

This is the Extreme Heavy Duty Differential Output Yoke Assembly from Traxxas.

This can be used as an accessory part on the Traxxas Rustler 4X4 VXL, Rustler 4X4, Slash 4X4 Platinum, Slash 4X4 Ultimate, Slash 4X4 VXL, Slash 4X4, Stampede 4X4 VXL, and Stampede 4X4.