This is a Hot Racing steel 2.5 x 31.5 mm Screw king pin set for Electric Slash 2WD Rustler 2WD or Stampede 2WD FEATURES: Spring Steel Screw 2.6 Pin for use in TRA 1/10 2WD Construction: CNC Harden Spring steel used to hold the front steering block (TRA3636 - NOT INCLUDED) to the castor block (TRA3632 - NOT INCLUDED) on the electric Rustler/Stampede. YOU WILL RECEIVE: Two king pins.