High Quality: Our nuts are made of high quality brass, with standard circular threads, deep and small tolerances, have high strength and hardness. Meanwhile, they can be used for a long time due to their anti-oxidation and strong corrosion resistance. Wide Application: These knurled nuts can be widely used in 3D printing, computers, watches, toys, cars, various kinds of plastic cases. Good Workmanship: Smooth surface and symmetrical internal thread and can be fixed well, pass rigorous test, avoiding slipping. Easy to Use: The sturdy external thread is easy to install, can be installed ultrasonically or heat in a tapered hole, the force is evenly tightened. Package Content: You will receive 15 different sizes of M2, M3, M4 and M5 nuts, 460 pieces in total and there is a good assortment. Color: Gold (Due to the display, there may be color difference) Package Content: 460 pieces Box Size: Approx. 17.6 x 10.2 x 2.3 cm. Box Material: PP