... 3,Advantage: Perfect quality, excellent service, low pric 1,Name : chipboard screw or DIN7505 2,Standard: DIN,ISO,GB,ANSI,JIS3 ... ,Material : Stainless Steel and carbon steel, Brass. Spring steel .4,Size: M3-M48 1/4"-3"5,Class: 4.8 6 ... half month 10,Advantage: Perfect quality, excellent service, low prices chipboard screw