Description:1. Application: It is good for thin albums, decorative bags, leather belts, sandals, boots, leather bags, etc.Fit for all kinds of art and leather crafts and DIY clothing production.2. Advantage: Precision mechanical thread, made of carbon steel material, nickel-plated surface treatment, high hardness. 3. Instructions: Make a hole between 0.5-1mm larger than the diameter of the female rod, put the screw and nut on both sides of the locked object, and select the appropriate tool to lock it.4. Notice: When using the post screws to lock items, the thickness must be less than the length of the screw rod + nut rod, otherwise, it will not be locked.Specification:Product Name: Phillips Screw PostMaterial: Carbon SteelMain Color: Silver ToneSurface Treatment: Nickel PlatedHead Dia.: 10mm / 0.39"Fit Hole Diameter: 5mm / 0.2"Male Thread Size (Screw): M4 x 5mm / 0.16" x 0.2"(D*L)Female Thread Size (Top): M4 x 6mm, 8mm, 10mm, 12mm, 15mm, 18mm, 20mm, 25mm,30mm(D*L)Package Content:90pcs * M4 x 5mm Male Screws10pcs * 5mm x 6mm Female Screws10pcs * 5mm x 8mm Female Screws10pcs * 5mm x 10mm Female Screws10pcs * 5mm x 12mm Female Screws10pcs * 5mm x 15mm Female Screws10pcs * 5mm x 18mm Female Screws10pcs * 5mm x 20mm Female Screws10pcs * 5mm x 25mm Female Screws10pcs * 5mm x 30mm Female Screws