77Pcs Carbon Steel Rivet Nut Tool kit Mandrel Head Set M3-M12 Rivets Tool

77-PIECE COMPLETE KIT: Includes 70 rivet nuts (10 each of M3, M4, M5, M6, M8, M10, and M12) plus 7 matching mandrel adapters for riveting tools.Paper box and bubble wrap packaging to protect your products | DURABLE METAL CONSTRUCTION: High-strength metal body with a black oxide coating resists rust, corrosion, and daily wear for long-lasting reliability. | KNURLED INSERT DESIGN: The knurled body increases grip and prevents rotation, ensuring a solid, tight fit every time the rivet nut is installed. | EASY 4-STEP INSTALLATION: Simply drill the correct hole size, thread the rivet nut onto the adapter, tighten with two wrenches or a drill, then reverse and remove the tool. | WIDE APPLICATION: Suitable for automotive, metal fabrication, DIY projects, and more the reusable mandrel adapters work across all 7 included size ranges.