The complete set includes 10 nut per size (3mm 10mm) with accuracy engineered threading, offering outstanding shear strength (45 50 hardness) and plated surfaces that resist rust in humid conditions This 66 piece carbon steel rivet nut set features 3mm to 10mm mandrels for versatile fastening, crafted from strong high carbon steel with anti erosion to withstand heavy duty applications in both household and industrial environments Ideal for both professional technicians requiring stable fastening solution and enthusiasts tackling home improvement projects like cabinet assembly or machinery maintenance Perfect for securing metal frameworks in construction projects, automotive undercarriage repairs, and furniture installations where shaking resistant, long lasting connection are critical simplify your workshop inventory with this comprehensive 66pc set every coated carbon steel nut undergoes rigorous to secure consistent thread engagement and load bearing capacity up to 8.8 grade standards, Manufacturer: RGYBAO