Usage Tips: SET: This set includes 110 sets of Chicago screws and 2 installation tools, all packaged in a clear plastic storage box for easy organization. Made from carbon steel, these screws are polished without any cast lines, guaranteeing superior craftsmanship and long-lasting durability. Thoughtfully Designed: These screws are designed to be aesthetically compatible with your craft projects. Each screw is precisely 9.5mm in diameter and varies in length from 4mm to 12mm to meet your different needs. The difference in length provides flexible options for any craft project you want to decorate. User-Friendly Features: These Chicago screws are designed to be easy to use, even for beginners. Simply select the appropriate pipe height, insert the stud into the hole, align the nut with the stud, and tighten with the included screwdriver. If necessary, you can punch holes using the punch provided. perfect for DIY Projects: These Chicago screws can greatly enhance the look of your DIY projects. perfect as stationary or decorative items, they serve multiple purposes and are an essential part of any craft kit. VERSATILE and MULTIPURPOSE: From belts and bags to clothing and books, these Chicago screws add subtle yet effective beauty to your creations. They're also practical enough to be used as fasteners to secure items like ledgers or photo albums, making them a versatile addition to your crafting supplies. Colour:A: Silver/B:As Shown Material:Metal Package Contents: 1 x Chicago Screw Leather Rivets Only the above package content, other products are not included. Note: Light reflection 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.