[90 sets of 6 sizes]M5x4mm, M5x5mm, M5x6mm, M5x8mm, M5x10mm, M5x12mm, 15 PCS of each size. [High material] these Chicago screws are made of high carbon steel with plated surface, clear grain, smooth and burr-free, waterproof and durable, no rusting. [ design] chamfered design is , thread, not easy to slip during , 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 , stationery ledger , photo album , 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 4mm, if the hole is too , it is easy to the screw to off. Material:carbon steel colour:Brown Contents: 1 set * leather rivets Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.