【HIGH QUALITY MATERIAL】-- The screw bolts and screw washers are made of high quality 304 stainless steel. The 304 stainless steel material features strength and offers good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and the excellent of oxidation resistance, which can ensure long time using 【SAFETY AND SWEET】-- The screw nuts adopt high quality material, which is environmental and non-poisonous. In the process of using, there are no toxic substances releasing to ensure your safety 【SHARP THREAD】-- Our screw thread is very sharp, clean and accurate. And the compact thread is not easy to out of shape and slid in the process of rolling. The deep and clear hex sockets and heads can make your working more easily. Our screws and nuts accord with standardized metric system 【WIDE APPLICATION】-- Walfront screw assortment is an ideal tool for home and workplace, professionals, amateurs, landlords, handymen, repair men, woodworking, construction, plumbing, HVAC, 3 Dimensional printed projects, communication equipments, ship assembly and so on 【GOOD STORAGE&ASSORTMENT】-- Useful assortment and come on a very nice case. Our kit contains M2 M2.5 M3 M4 M5 popular sizes: M2 × 6mm -- 20pcs, M2 Nuts -- 20pcs, M2.5 × 8mm -- 20pcs, M2.5 Nuts -- 20pcs, M3 × 8mm -- 10pcs, M3 × 12mm -- 5pcs, M3 × 16mm -- 5pcs, M3 Nuts -- 20pcs, M4 × 8mm -- 5pcs, M4 ×16mm -- 5pcs, M4 Nuts -- 10pcs, M5 × 8mm -- 5pcs, M5 × 16mm -- 5pcs, M5 Nuts -- 10pcs. All of screw bolts and screw washers will be packed in a transparent plastic box, Weight: 0.3086471668 Pounds, Manufacturer: Walfront