Premium material: our nut games and hexagonal bolts are made of upper carbon steel with rust -proof, excellent wear resistance, pleasant and smooth surface, solid and durable for long -term use, providing strength and good resistance to the Corrosion in many environments. Easy to use: the hexagonal nut set can expand the contact area and reduce pressure to protect bolts and parts. Hexagonal steel threads are uniform, soft and strong, do not deform or slide easily in the work process, combine perfectly with nuts. Easy to transport: All nuts and screws are packed in a divided plastic box divided , of several lengths, a completely varied, organized and easy to open, convenient and portable assortment.