120pcs Iron Rivet Nut Kit Rivnut Insert Nutsert Flat Head Threaded M4-M10
Size: M4, M5, M6, M8, M10. 50pcs x M4 rivet nuts. 10pcs x M10 rivet nuts. Punk Spike Cone Studs Rivets for Leather Craft Handbags Clothing Shoes 12mm. M4 for sheet which is 0.5-2.5mm thick. M10 for sheet which is 1.0-5.0mm thick.