Features: Made of alloy steel material, good corrosion resistance and never rust, durable to use. Equipped with a plastic box, you can classify screws in an organized manner, more convenient to carry and take out. Use this fastener with the hex wrench, hold the mechanical parts firmly in place. Different sizes for general purpose use, meet all your need. Used widely in the home and office appliance, furniture and other machinery industry. Specification: Condition: Brand New Material: Alloy steel Standard type: German standard Standard number: 10.9-7-01 Size type: M3 Box size: Approx. 13 x 6.5 x 2.5cm or 5.1 x 2.5 x 0.9inch Weight: 372g Button Head: 100pcs x M3x4 80pcs x M3x6 70pcs x M3x8 60pcs x M3x10 50pcs x M3x12 Flat Head: 100pcs x M3x4 80pcs x M3x6 70pcs x M3x8 60pcs x M3x10 50pcs x M3x12 Package Included: 1 x Box of Screws Kit( Included 720pcs ) Note: Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully. Please allow 1-3cm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.