Various sizes: M3x3mm, M3x4mm, M3x6mm, M4x4mm, M4x6mm, M5x5mm, M5x8mm, M6x6mm, M6x10mm, M8x8mm. 20pcs for each size. Stainless steel material: resistant to wear, not easy to oxidize, not easy to deform and durable. Standard dimension: the threads are clear and sharp, easy to remove. screw and not easy to fall off. Convenient and practical: the plastic packaging is easy to remove. wear and the classification is clear at a glance, so you can easily replace the screws. flat head screws lost or damaged. Scope of application: flat head screws. Flatheads are commonly used in the repair and replacement of door handles, brackets, lamps, faucets, buttons and other electrical appliances in homes, shops, garages and other small repair shops.