... Hex Socket, Torx, Rice character type, One Way etc.MaterialCarbon steel, stainless steel, SS-304, SS-302, Aluminum, Brass, Bronze, medium ... anodizing etc.Applications Automotive, instrument, electrical equipment, household appliances, furniture, mechanical equipment, daily living equipment, electronic sports equipment, light ... .com all kinds of screw ,machine screw ,stainless steel screw and fasteners