Nut Assortment in 7 Sizes: The package contains 165 brake nuts in 7 optional sizes, including 45 x m3, 35 x m4, 30 x m5, 30 x m6, 15 x m8, 10 x m10, 5 x m12, the valid combination is enough to meet your different needs. High Quality Material: These hex nuts are made of 304 stainless steel, sturdy, durable, rust-resistant, corrosion-resistant and anti-oxidation, not easy to deviate, you can use them with confidence. EXCELLENT TIGHTENING: These lock nuts conform to the standard metric system, so they will conform to most bolts or screws. The precise thread ensures that the nut securely locks the spindle even under vibration. Easy to Sort: These self-locking nuts are neatly stored in a transparent storage box, so you won’t be bothered with sorting. Moreover, the storage box offers you a perfect resolution to store the nuts. WIDE APPLICATION: These anti-rust nuts are very practical against vibration loosening and very useful for daily life. You can use them for DIY or industrial use.