Premium MaterialOur nut and bolts kit is made of outstanding carbon steel with rust-proof plated, great wear-proof, a nice smooth finish, solid and durable for long time use, provides strength and offers good corrosion resistance in many environments. Easy to UseThe nuts can expand the contact area and reduce the pressure in order to protect the screws and parts. The hex steel screw threads are uniform, smooth and tight, not easy to deform and slide in the working process, perfectly match with nuts. Easy to CarryAll of nuts and bolts are packed in a sturdy divided plastic box, various lengths, completely diversified assortment, organized and easy to open and look for, convenient and portable. Wide ApplicationsWidely used in the home and office appliance, communication equipments, ship assembly and other machinery industry, furniture, car and motorcycle repair and DIY inventions, industrial and construction fasteners, etc. What You Will GetYou will get 30pcs m3x8 mm, 30pcs m3x12 mm, 30pcs m3x16 mm, 30pcs m3x20 mm, and 120pcs m3 nuts 20pcs m4x8 mm, 20pcs m4x12 mm, 20pcs m4x16 mm, 20pcs m4x20 mm, and 80pcs m4 nuts 15pcs m5x8 mm, 15pcs m5x12 mm, 10pcs m5x16 mm, 10pcs m5x20 mm, and 50Pcs m5 nuts, a total of 500pcs, enough for your daily use.