304 high quality stainless steel. Stainless steel is a common material with a density of 7.93 g/cm3, also called 18/8. L'acier inoxydable est un matriau courant d'une masse volumique de 7,93 g/cm3, galement appel 18/8. It has good workability and high toughness up to a temperature of about 800 degrees. Different sizes of wood screws: M3*4/5/6/8/10/12, each 55 pieces, M3*14/16/18/20/25/30, each 30 pieces, including 300 pieces flat washers, 300 pieces nuts, to meet different needs. It is a very essential hand tool for the family. With M3 nuts and washers, installations are now more precise with an increase in the contact surface, which reduces pressure and protects parts and screws. Stainless steel screws, steel nuts and washers are arranged in a storage box, which allows you to easily find the series and avoid loss when needed. The main use of stainless steel screw is very common in electronics, electrical appliances, chemicals, water, machinery and equipment, furniture and many other fields. 304 Stainless Steel Hex Socket Head Button Material High quality 304 stainless steel. It has good workability and high toughness up to a temperature of about 800 degrees. Anti-rust Corrosion resistance Pollution-free Product Quality Premium Material High hardness Main Features of this M3 screw Dimension&Quantity M3 * 4/5/6/8/10/12 screws 55 Pieces Each M3*14/16/18/20/25/30 screws 30 Pieces Each M3 Nut and Washer 300 Pieces Each High quality we use high quality 304 stainless steel to produce our product, the product surface is smooth, long product life, highly recommended by craft lovers Delivery quantity: 1110pcs/box Product color: silver Product size: 17.6 * 10.2 * 2.3cm Note: manual measurement, please allow 1 - 3cm error!!!Yeuri