... flange head,Round head,Ball head,Button head...Socket typesPhillip type,Pozi type,Eleven type,hexagonal type ... 's Size :34cm*26cm*16cm,its CBM :0.014 M3 4)There are 48 cartons form a ... always use C1022 ,The percent C element is 0.18%-0.23% ,is higher hardness than other.2.Fasteners ... ' Head is much thicker ,it is strong not break down . meanwhile,socket ...