SUNG JIN METAL Co was founded in 1990 . It has 15 years history. In the earlier stages, we specialized in producing screws as belowSELF DRILLIN SCREW,SELF TAPPING SCREW,SEMS SCREW,TAPPING SCREWS MACHIN SCREWS,SPRING WAHERS,DRYWALL SCREW, WOOD SCREWSHEX HEAD SCREWSSIZE : 1.7MM TO 12 MM IN DIAMETERSCREW HEAD : FALT, OVAL,ROUND, TURSS , PAN , BINDING, HEX, HEX WASHERMATERIAL :TITAN , STEEL, STANINLESS, BRASS,STANDARDS : ANSI,DIN,ISO,JIS,KS ( a part of catalog)In addition to the products, we began manufacturing socket head screws and sems socket head screws.SIZE : 3MM TO 12 MM IN DIAMETERSCREW HEAD : SOCKET HEAD, FALT HEAD, BUTTON HEADMATERIAL : ALLOY STEEL, CARBON STEEL , STAINLESS (304,316) , GRADE: 8.8 , 10.9 , 12.9SEMS SOCKET SCREWS are same as aboveSpecial item per print or sample are welcome to producea part of catalog We are growing every year and own strong ability in production. Excellent service, highly quality, reliable price and punctual delivery are our characters in the domestic market. And I hope more and more customers around the world come and do business with us. We have the sincere to built a strong business relationship with your company in the near future. Please try to let us quote some items for you. Then, you?ll find SUNG JIN METAL will be your best partner in fastener field.Thanks for your kind attention.