[90 sets of 6 sizes]M5x4mm, M5x5mm, M5x6mm, M5x8mm, M5x10mm, M5x12mm, 15 PCS of each size.[High quality material] these Chicago screws are made of high quality carbon steel with nickel plated surface, clear grain, and burr-free, waterproof and durable, no rusting.[Excellent design] chamfered design is , deep thread, not easy to during rotation, even force and good tightening strength.[Widely used] These leathercraft rivets are especially suitable for DIY various leather crafts, as a fixed or decorative items used. For example: belt connection, bag decoration, clothing decoration, key bag nails, stationery ledger nails, photo album nails, calendar screws, etc.[Easy to install] pick the right length of screw, put the stud through the hole, align the nut with the stud and tighten the screw. Note: When installing, the hole please do not exceed 4mm, if the hole is too , it is easy to cause the screw to fall off.Material:carbon steelcolour:BlackPackage Contents:1 set x leather rivetsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.