• 135-piece set of hex screws, nuts, and washers. • Carbon steel material with white zinc, resistant to corrosion and rust. • Designed to withstand heavy loads with strong traction. • Uniform strength, no displacement, obvious threads, and good grip. • Washers increase contact area and protect parts. • Suitable for electronic, mechanical, digital products, appliances, automobiles, and more. • Includes: 8 pieces M6x18mm, 12 pieces M6x25mm, 8 pieces M6x40mm, 28 M6 nuts, 28 M6 washers, 6 pieces M8x18mm, 5 pieces M8x25mm, 6 pieces M8x40mm, 17 M8 washers, 17 M8 nuts.