Features Alloy steel: The hexagonal countersunk screws assortment kit is 100% brand new, and is made of alloy steel, which is not easy to corrode and rust, has stable performance and is durable Equipped with a storage box: Black alloy steel flat head hex socket screws kit is equipped with a storage box, with a compartment in the middle, which can sort the screws in an orderly manner, making it easier to carry and take out 10.9 grade high strength: The hexagonal countersunk screws assortment kit has 10.9 grade high strength, exquisite craftsmanship, fine and neat thread texture, using standard inner hexagon, round and firm surface Application: The black alloy steel screw set can be widely used in door and window industry, computer maintenance and assembly, automobile manufacturing and production, door and window assembly, etc. Package: There are 720 screws in the package, including button head 100pcs x M3*4, 80pcs x M3*6, 70pcs x M3*8, 60pcs x M3*10, 50pcs x M3*12; flat head: 100pcs x M3*4, 80pcs x M3*6, 70pcs x M3*8, 60pcs x M3*10, 50pcs x M3*12 Features: The hexagonal countersunk screws assortment kit is made of alloy steel material, good corrosion resistance and never rust, durable to use. Black alloy steel flat head hex socket screws kit is 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. Black alloy steel flat head hex socket screws kit is used widely in the home and office appliance, furniture and other machinery industry. Specification: Condition: 100% 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 /5.1 x 2.5 x 0.9inch Weight: 372g Button Head: 100pcs x M3*4 80pcs x M3*6        70pcs x M3*8        60pcs x M3*10    50pcs x M3*12        Flat Head: 100pcs x M3*4        80pcs x M3*6        70pcs x M3*8      60pcs x M3*10      50pcs x M3*12      Package Included: 1 Box of Screws ( 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. Package List