<h3>Key features</h3><ul> <li>8.8 GRADE ZINC YELLOW COATED：This nuts and bolts assortment kit features 8.8 grade zinc plated steel – the industry standard for high-strength applications like automotive, machinery, and structural repairs. The zinc yellow chromate finish delivers 3x better corrosion protection than ordinary zinc plating, withstanding moisture, salt, and harsh environments. Real strength. Real protection</li> <li>M4 TO M12 COMPLETE METRIC COVERAGE: This comprehensive bolts and nuts kit gives you 1425 precision pieces spanning the most essential metric sizes: M4, M5, M6, M8, M10，M12 From precision electronics to heavy industrial equipment, every fastener you need is right here. No more hunting through disorganized drawers – just grab the right size and get back to work</li> <li>PROFESSIONAL LABELED STORAGE CASE：This M4 M5 M6 M8 metric bolt kit arrives in a heavy-duty, impact-resistant organizer case with: Crystal-clear lid – See every compartment at a glance; Permanent size labels; Adjustable compartments – Keep metric sizes perfectly separated; Rugged construction.Your hardware organizing is solved. The right size is always visible, labeled, and ready to go</li> <li>PERFECT FIT FOR EVERY APPLICATION: Nothing ruins a project faster than cross-threading or loose-fitting fasteners. That's why every bolt in this metric bolt assortment features precision-rolled threads manufactured to strict tolerances. Buttery-smooth engagement with matching nuts, superior vibration resistance, and a secure hold that won't back out under load. Whether you're threading into existing equipment or assembling new components, these 8.8 grade fasteners adapt perfectly to a wide range of devices – from motorcycles to machinery, from furniture to farm equipment. Strong, consistent, and reliable every time</li> <li>100% SATISFACTION SERVICE: The 1425 pieces metric bolt assortment is available for general repair and replacement. If you have any questions with our bolt and nut assortment kit, please feel free to contact us. We are always online</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>