520Pcs Bolts Nuts Assortment Kit Metric M3 M4 M5 M6 Assorted Hex Head Stainless Steel Screw Flat Washers1MORE RELIABLE PACKAGING: The nut and bolt set is neatly placed in a plastic storage box, easy for you to access, store, carry, compact and portable 2EASY TO USE: Bolts and nuts with standard hex threads are suitable for a variety of applications and easy to use, suitable for industrial and domestic use 3EASY INSTALLATION: Common household tools make screws and nuts easy to install. Also equipped with corresponding flat washers for better tightening 4ACCURATE AND CLEAN THREAD: All kinds of nuts and bolts use fine manufacturing process, bring smooth surface, clear thread without burr, to ensure that users have a good use experience 5WIDE RANGE OF APPLICATIONS: Nut and bolt kits can be used in a wide range of household appliances, furniture window and doors, garages, outdoor gazebos or construction pet houses, as well as car, truck, RV, lawn mower, boat and yacht repairs