*6 years experience of manufacture camera tripod screw *OEM, ODM all welcomed *best price,high quality camera tripod screw basic informations:A.Product specifications TypeBroaching,Drilling,Etching/Chemical M... Sizeaccording the drawings or as per your need Materialssteel,fast steel C12L14 for cnc turning Surface treatmentgalvanic/chemical nickel/zinc,Dacromet,Geomet, burnishing,wet-varnishing, ...