【Premium Quality】These hex flat head countersunk screws and nuts washers are made of 304 stainless steel, which is sturdy, not easy to damage, rust-resistant, and corrosion-resistant in cold and wet weather, environment-friendly, no pollution, high hardness, and durable for long-time use. 【Easy to Use】 Our flat cross screws assortment kit includes some common metric sizes, easily and quickly replace a lost or broken set screw. The threads of the hexagon stainless steel screws are sharp and accurate which is not easy to deform and slide in the working process. 【Easy to Store】All mixed screws packs are organized by size/type in a transparent plastic storage case to keep it all neat and handy so that you can easily find them in series and avoid loss. Convenient to take it anywhere you go and takes up little space. 【Wide Applications】Our pan head screws are suitable for door handles, classified instruments, machinery industry, electronic products, household appliances, other small repairs