... patent,8 directional for worker used,easy work & stronger. RINGLOCK SYSTEM(ringlock,ring system,scaffolding ringlock,ringlock system scaffold,scaffolding)1. Good quality ... galvanized.3.) Material: Q235, Q345...etc.4.) Finishing:Forged,casted,pressed,cut,seal....etc5.) Quality Control: ISO9001:2008 Certification, Quality Test ...