... ,brass 2)Weight from 0.05-20kg 3)Free Forging,Rigging Hardware,Hot Forging Free Forging,Rigging Hardware,Hot Forging 1) Material ... press machine,Middle Frequency electric heater, Air hammer,Precision machining, and test facility5) Surface finish: Oiled (rust-proof), zinc, nickel, chrome ... Parts, hardware tools, scaffold couplers7) Manufacturer certification: ISO9001 (2000) / TS16949 Free Forging