Package includes 36 bolts in 6 different sizes, 39 nuts in 3 different sizes, and 38 washers in 3 different sizes, meeting your various home repair needs.Mr. Pen's bolts, nuts, and washers in this kit are all made of premium galvanized iron, providing excellent hardness and strength; they're also rust-resistant, ensuring a longer service life.Our metric bolts and nuts assortment package includes a high-quality clear organizer box that keeps the bolts, nuts, and washers organized and categorized.Mr. Pen bolts kit, across most daily used sizes, can be widely applied to all kinds of precision machinery, classified instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc.Our bolts, nuts, and washer assortment kit is an ideal tool for home and workplace, professionals, amateurs, handypersons, repair men, woodworking, construction, furniture, 3D printing projects, communication equipment, ship assembly, and so on.