These are The Yeah Racing Traxxas TRX-4M Heavy Duty Steel Center Driveshaft Set. These optional front and rear center driveshafts were constructed from heavy duty steel to provide superior durability compared to the stock composite driveshafts.

Note: (1) 0.050in (1.27mm) hex driver is required for assembly.
Features:

• Perfect fit for the TRX-4M
• HD Steel

Includes:

• (1) Front Center Driveshaft
• (1) Rear Center Driveshaft
• (4) 0.050in (1.27mm) Screw