Torx machine screw Standard:JIS,ISO,BS,ANSI Material:steel,copper Use:used in machines,constructions and furniture Torx machine screw Planting:ZINC,WZN,LZN,BK,NIDia:3.5mm-4.2mm-4.8mmLength:13~63mm Advantages:good quality,good service,timely delivery,large production capacity,competitive price we can supply according to the buyers samples or drawings of pictures