1) Standard: DIN, ANSI 2) Material: Steel 3) Diameter: 2.5-6mm, 4#~14# 4) Length: 10-160mm, 1/2" Chipboard screws, wood screws, drywall screws, self driling screws, self tapping screws, conceret screw Standard: DIN, ANSIMaterial:Carbon Steel ,Stainless steelDiameter2.5mm~6mm, 4#~14#Length10~160mm, 1/2"~6"ThreadUNC, UNF fine or coarseFinishPlain, zinc, black phosphated, grey phosphated, nickel, ...