Comparison : Item # CFH2-580-2.1, CFH Series - Steel (Metric)
Item # CFH2-580-3.5, CFH Series - Steel (Metric)
Item # CFH2-580-5.0, CFH Series - Steel (Metric)
Item # CFH2-610-2.1, CFH Series - Steel (Metric)
Item # CFH2-610-3.6, CFH Series - Steel (Metric)