Made of premium nylon material with good workmanship, this screws and nuts kit is reliable, , good texture, not easy to deform or break, can be used for long time. Different tools have different functions, has excellent fastening effect and stability, can offer you a good using feeling. Features -Color:Black -Material:Nylon -Size:17.30X9.50X2.00cm/6.80X3.73X0.79in -Made of premium nylon material and good workmanship, with high hardness, these screws and nuts are for longer service life. -Reasonable thread structure design of the pillar spacers can effectively prevent screw loosening, having good fixing effect. -The high-strength screw set has very practical functions, different tools can meet your demands very well. -Equipped with a storage and organization box, easy to store and carry, convenient for you to use at any time. -This machine screw nut kit is easy to install, widely used in fixing PCB, drone, computer motherboard, etc. Package list: 15 x spacers(6mm+6mm) 15 x spacers(10mm+6mm) 15 x spacers(15mm+6mm) 15 x spacers(20mm+6mm) 15 x spacers(6mm) 15 x spacers(10mm) 15 x spacers(15mm) 15 x spacers(20mm) 60 x nylon nuts 20 x nylon washers 20 x screws(6mm) 20 x screws(12mm) 20 x screws(20mm)