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COMMERICIAL  QUALITY  ROUND  STEEL  CHAIN Commercial Quality Round Steel Chains are mainly  produced for general purpose usages such as Swing, Front door pulling, Fishery, Protection and Safety  etc.   The chains are to be tested  breaking force to comply with manufacturing standard. Material  :  Low Carbon Steel  SWRM 10, SWRM 12 Available surface : Self - Colored Bright Polished Zinc - Coated Bright Polished   HEAVY  DUTY  ROUND  STEEL  CHAIN Heavy Duty Round  Steel Chains are  especially   produced  for heavy duty works.  The chains are to be tested  breaking force to comply with manufacturing standard.   Materail : Cold Heading Quality  SWRM 8, SWRM 10.  TKS PROOF COIL CHAIN - GRADE 30 Proof Coil  Chains - Grade 30  are  especially   produced  for heavy duty works and particulary industry.  The chains are to be tested  breaking force to comply with  National Association of Chain Manufacturers, ASTM / ANSI 413 Grade 30. TEST CERTIFICATE: all grade 30 chains are proof  tested  available upon request. Stainless Chains   are also available   CHAINS DETAILS (Sizes, Specification, Working Load)