[90 Sets of 6 Sizes] M5x4mm, M5x5mm, M5x6mm, M5x8mm, M5x10mm, M5x12mm, 15 PCS of each size. [High Quality Material] Chicago screws are made of high quality steel with nickel plated, clear grain, smooth and burr-free, waterproof and rust-free. [Excellent] Chamfered is more secure, deep thread, not easy to slip during rotation, uniform force and good clamping force. [Widely Used] Leathercraft rivets are especially suitable for DIY various leather crafts, as fixed or decorative objects used. For example: belt connection, bag decoration, clothing decoration, key bag nails, stationery ledger nails, photo album nails, calendar screws, etc. [Easy to install] Choose the right length of screw, place the stud into the hole, align the nut with the stud and tighten the screw. Note: When installing, the hole does not exceed 4mm, if the hole is too large, it is easy to drop the screw. Material: steel color: black Package Contents: 1 * leather rivets Only the above package content, other products