【Outstanding Material】Our thread lock nuts are made of high-quality stainless steel and nylon, which has corrosion-resistant, and can prevents loosening and backing-off. Durable for long time use. 【Nylon Insertion】Hexagon nut with a thread to prevent loosening, nylon insert prevents loosening and holds nut firm during vibration. These threaded inserts are water-proof, rust-resistant, and sturdy. 【Easy to Storage】Individual organiser compartments are designed for easy-storing. The all-round transparent box makes it easy to see thread nuts inside even when stacked. Very strong and will not open during delivery. 【Wide Applications】The locking nuts can be used for screwing on to bolts, as well as threaded rods and cap screws. Ideal for folding beds, wardrobes, miners, engines, textile machinery, workshops, engine and so on. 【What You Will Get】You will get 165 pcs/7 sizes of the most commonly used lock nut set, including 45 pcs M3 nuts, 35 pcs M4 nuts, 30 pcs M5 nuts, 25 pcs M6 nuts, 15