
CSK lebur socket head screws yawanci ana kera su daga kewayon kayayyaki iri-iri, kowanne an zaɓa don biyan takamaiman buƙatun aiki. Carbon karfe abu ne da aka saba amfani dashi don aikace-aikacen manufa na gaba ɗaya. Maki kamar 4.8, 8.8, da 10.9 ana yawan amfani da su.
Hebei Fujinrui Metal Products Co., Ltd an kafa shi a cikin 2004 kuma yana cikin garin Handan, lardin Hebei. Kamfanin yana da fadin murabba'in mita 10,000 kuma yana da ma'aikata sama da 200. Yana da wani sha'anin hada fastener samfurin samar da karfe surface lalata kariya, tare da balagagge samar da fasaha tawagar. Fiye da shekaru 20 na gwaninta a cikin masana'antar fastener.