... our Products ? MaterialsCarbon steel,Stainless steel,Alloy steel,Copper,Aluminum are available.Carton steel is high quality iron ... are available.Head typesHexagon head,Mushroom head,Pan head,Countersunk head,Bugle head,Oval head,Hex flange head,Round head,Ball head,Button head...Socket ... 23% ,is higher than other Carbon Steel .2.Fasteners' Head is much thicker than some other manufacturers ...