[Prevent falling off] Cap nuts can prevent nuts from loosening and falling off. [Wide application] These kits can be used as high strength fasteners for machinery, furniture, vehicles, etc. [High quality material] Made of nylon, these cap nuts are sturdy and durable. [Easy to use] It is not easy to slip when turning the screw with a wrench, mainly used for rough and simple components . [Packing List] 100% Brand New and High Quality Nylon Cap Nut Kit M3 M4 M5 M6 M8 M10 70pcs.