Size: M4, M5, M6, M8, M10. 50pcs x M4 rivet nuts. 10pcs x M10 rivet nuts. M4 for sheet which is 0.5-2.5mm thick. M10 for sheet which is 1.0-5.0mm thick. Punk Cone Spikes Dragon Studs Screwback for DIY Leather Clothing Jacket 10/20/50.
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