This comprehensive 6-piece rivet nut puller head set includes sizes from M3 to M10, making it a versatile addition to your toolbox. The set features durable black steel construction for long-lasting performance and reliability. Each puller head is precisely engineered with specific dimensions - ranging from the compact M3 at 3.3cm/1.3 inches to the larger M10 at 5.6cm/2.2 inches in length. The set includes M3, M4, M5, M6, M8, and M10 sizes, allowing you to work with a wide range of rivet nut applications. The zinc-plated finish on the upper portions provides enhanced corrosion resistance, while the black oxide coating on the main body ensures durability. These puller heads are designed for precise fitting and efficient riveting operations, making them ideal for both professional mechanics and DIY enthusiasts. The graduated sizing makes it easy to identify and select the correct puller head for your specific application, saving time during projects.