General description 90 Sets Chicago Screws Assorted Kit includes 6 sizes of round flat head leather rivets, perfect for various DIY leather crafts. Each size comes with 15 pieces, providing a total of 90 sets for your projects. Technical specifications Sizes: M5x4mm, M5x5mm, M5x6mm, M5x8mm, M5x10mm, M5x12mm Material: High-quality steel with nickel plating Color: Black Measurement allowed error: +/- 1-3 cm Usage Ideal for DIY leather crafts, serving as fixed or decorative objects Applications include belt connections, bag decorations, clothing decorations, key bag nails, stationery ledger nails, photo album nails, and calendar screws Installation Select the appropriate screw length Insert the stud into the hole Align the nut with the stud and tighten the screw Ensure the hole does not exceed 4mm to prevent the screw from dropping Other information Light shooting and different displays may cause slight color variations