Double End Bolt,Special 1.ISO,ANSI,CE,JIS,DIN,BS& non-standard fastener supply 2.ROHS is capable 3.Grade: ... available.Carton steel is high quality iron,such as 1022,1018,1010,1008,1015...Medium carbon steel ... ...copper is shiny brass , pure copper,such as H62,H65,H68...Aluminum is good Aluminum.Meanwhile, ... :They are used in most of places such as drywall,concrete,chipboard,machine,wood...2) Main export ...