• High-quality material: Made of carbon steel with blue and white coating, these nuts are corrosion-resistant, rust-proof, high hardness, and durable. • Packing list: The set includes a total of 130 pieces, with 12 different types of screw inserts: M6*25 (5 pieces), M6*10 (20 pieces), M6*15 (10 pieces), M6*17 (10 pieces), M6*20 (10 pieces), M6*13 (20 pieces), M8*25 (10 pieces), M8*15 (15 pieces), M8*17 (10 pieces), M8*20 (10 pieces), M10*25 (5 pieces), M10*20 (5 pieces). • Practical design: The external thread structure provides good tensile strength and deep thread precision, preventing drops due to torsion or vibration and ensuring a more stable connection. • Easy to store: Comes in a transparent plastic sorting box with 12 dividers for clear organization and easy handling. • Wide application: Ideal for mechanical fastenings, plywood, fiberboards, furniture, and drawers. They are quickly installed by drilling a hole of the appropriate size and tightening with an Allen wrench. • Product dimensions: Box size: 20.5 x 13.5 x 4 cm.