Features: Made of alloy steel material, good corrosion resistance. corrosion and never rust, durable in use. utilize. Equipped With a plastic box, you can classify the screws in an organized way, more convenient to use. transport and to remove. Use this clip with the key. hexagonal, hold the mechanical parts firmly in place. Different sizes for general use, meet your needs. all your needs. Used widely in home and office, furniture and other machinery industry.Specification: Condition: 100% Brand New Material: Alloy Steel Standard Type: German Standard Standard Number: 10.9- 7991-03 Screw type: M3/M4/M5 The color black Box size: approx. 17.5 x 10 x 2.3cm/6.8 x 3.9 x 0.9inch Weight: 510g Package included: 20PCS x M3 x 8 20PCS x M3 x 12 20PCS x M3 x 16 20PCS x M3 x 20 80PCS x M3 Nuts 20PCS x M4 x 8 20PCS x M4 x 12 20PCS x M4 x 16 20PCS x M4 x 20 80PCS x M4 Nuts 15PCS x M5 x 8 15PCS x M5 x 12 15PCS x M5 x 16 15 PCS x M5 x 20 60PCS x M5 Nuts Note: Please allow slight deviation for the