[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 , clear grain, smooth and burr-free, waterproof and , no rusting. [Excellent design] chamfered design is , deep thread, not easy to slip during rotation, even force and good tightening strength. [Widely used] These leathercraft rivets are especially suitable for DIY 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 large, it is easy to cause the screw to fall off. Material:carbon steel colour:Black Package Contents: 1 set * leather rivets Only 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. [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. [High quality material] these Chicago screws are made of high quality carbon steel with nickel plated , clear grain, smooth and burr-free, waterproof and , no rusting. [Excellent design] chamfered design is , deep thread, not easy to slip during rotation, even force and good tightening strength. [90 sets of 6 sizes]M5x4mm, M5x5mm, M5x6mm, M5x8mm, M5x10mm, M5x12mm, 15 PCS of each size. [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 large, it is easy to cause the screw to fall off.