Description: These screws are made of 304 stainless steel, which is durable, resistant to rust and corrosion. There are many length in one set which can be commonly used in home and office appliance, wood furniture, repair and inventions. Features: Made of 304 stainless steel, which provides strength good corrosion resistance in many environments. Ideal for use in confined areas where the head needs to be flush or below the surface. Screws have sharp threads that cut into a material such as soft metal sheet, plastic or wood. Eight common sizes for general purpose use. Used widely in the home and office appliance, wood furniture, repair and inventions. Specifications: Material: 304 stainless steel Head Shape: Truss Head Weight: Approx. 333g Size and Quantity: M4*8mm 25pcs M4*10mm 25pcs M4*12mm 25pcs M4*16mm 25pcs M4*20mm 25pcs M4*25mm 25pcs M4*30mm 25pcs M4*35mm 25pcs Package Includes: 200 x Cross Self-tapping Screws Note: Please allow 1-3mm error due to the manual measurement. Thanks for your understanding.