Products Description 1.Can probide meet DIN,NACM,BS JIS and other standards ring chains and user requirements nonstard ring chain.2.According to the user needs to provide hot-dip zinc,dacromet,metal coated,Blacken,Carburiation, oil and various surface treatments on the chain. 3.Safety Assurance:4-fold safety factor of 2.5 times the proof load. CAlibrated Hoist Chain(GRADE 80) standard EN818-7