slbrillreGood Performance. This flat head rivet nut has good performance of fixing function, Can be easily installed in many different kinds of material including steel, plastic and fiberglass. Sturdy and Durable. Made from 304 stainless steel providing strength, it has a sturdy body without rust properties. Nuts have a work-hardened surface providing high strength, load-bearing threads. Professional design. The ribbed body provides better torque-to-turn strength than conventional, non-ribbed rivet nut, features a large bearing surface it helps to improve the bit retractable ability. Various Sizes. There are different sizes, M3, M4, M5, M6, M8, M10 for choices, comes with a handy plastic box, easy to organize and use next time, makes the job easier and faster. Feature - SLBrillre Rivet Nut Tool Set/Installation: Manual/Pneumatic type available. Perfect for professional and home use. - Built-in function. The rivet screw often has a built-in function, such as a slot, which makes it easier to tighten the fastener. - High quality for durable and long-lasting use. Lightweight for portable installation. Specifications Material: 304 stainless steel Color: silver Size: M3, M4, M5, M6, M8, M10 Type: flat head rivet nuts Item Quantity: 165pcs Condition: brand new Package includes 50 * M3 rivet nut 50 * M4 rivet nut 30 * M5 rivet nut 20 * M6 rivet nut 10 * M8 rivet nut 5 * M10 rivet nut