Corrosion Proof Engine Rocker Arm is a reciprocating lever that conveys radial movement from the cam lobe into linear movement at the poppet valve to open it. The Engine Rocker Arm is offered in roller and radius type models. The Engine Rocker Arm is available in accurate dimension and corrosion resistant finish. Corrosion Proof Engine Rocker Arm comes in a sturdy construction that ensures optimum performance for longer period of time.