This brake S-Camshafts catalogue is for truck or trailor brake drum collect use only.There are for BPW,ROR,SAF,SMB,FRUEHAUF trucks and trailors brake system .raw material:carbon steel;Material of brake camshaft: Carbon steel * Cam head and spline is machined by CNC machining center * Competitive priceS head and shaft spline is induction hardened for added strength and durability.Below are part of the Brake S-camshaft we provide, for more informaton please feel free to contact us.