These screws and nuts are made of A2 stainless steel, which is resistant to rust and corrosion.There are many length in one set which can be commonly used in home and office appliance, machinery, furniture, repair and DIY inventions. _x000D_ _x000D_ _x000D_ Features: _x000D_ Made of A2 stainless steel material, the A2 stainless steel material provides strength and offers good corrosion resistance in many environments. _x000D_ Ideal for use in confined areas where the head needs to be flush or below the surface. _x000D_ Fixing component, industrial and construction fasteners. _x000D_ Six common sizes and three optional types for general purpose use. _x000D_ Used widely in the home and office appliance, communication equipments, ship assembly and other machinery industry. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: A2 stainless steel _x000D_ Type(optional): _x000D_ A: Cap head _x000D_ B: Button head _x000D_ C: Flat head _x000D_ _x000D_ _x000D_ Size and Quantity: _x000D_ Screws: _x000D_ M3 * 6 25PCS _x000D_ M3 * 8 25PCS _x000D_ M3 * 10 25PCS _x000D_ M3 * 12 25PCS _x000D_ M3 * 16 25PCS _x000D_ M3 * 20 25PCS _x000D_ _x000D_ _x000D_ M3 Nuts 100PCS _x000D_ _x000D_ _x000D_ Package Includes:_x000D_ 150pcs x Screws _x000D_ 100pcs x Nuts _x000D_ _x000D_ _x000D_ Note:_x000D_ 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding._x000D_ 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.