Features: This is a set of fasteners including button head screws, flat heat screws and flat washers. Flat head screws are great to use in confined areas as fixing component, industrial and construction fasteners, button head screws are for general purpose. There are many different length of button head and flat head screws that you can use for various purposes. Total 120 pieces screws and 60 pieces washers will meet your daily basic needs. Used widely in the home and office appliance, communication equipment and other machinery industry. Specifications: Material: 10.9 grade alloy steel Screw Type: Button & flat head hex socket Size and Quantity: Button Head Screw: M3*6 15pcs M3*8 15pcs M3*10 15pcs M3*12 15pcs Flat Head Screw: M3*6 15pcs M3*8 15pcs M3*10 15pcs M3*12 15pcs Flat Washer: M3 30pcs M4 30pcs Box Size: 13.2 x 7.2 x 2.3cm / 5.19 x 2.83 x 0.9" Package Includes: 120pcs x Screws 60pcs x Flat Washers