... than 20 years experience casting rigid torque arm for trailer Quality System CertificateISO 9001Dimension ToleranceCT7Surface ... Test, Dimension Inspection, Hardness TestingSurface TreatmentHeat Treatment, Machine, Polishing, Chrome, Zinc, Nickel PlatingPackingCartons, Wooden Case ... Silicone(Water Glass)Stainless Steel, Carbon Steel, Special Alloy Steel, Bronze, Brass, AluminiumSilica SolFORGINGHammer ...