1、This is a screw set designed for desktop computer. 2、The set includes: Mainboard insulation gasket, chassis hand twist screws, CD-ROM set screws, hard drive screws, conventional chassis fan retaining screws, mainboard fixed screws, brass standoffs screws, chassis high-strength screws. 3、The screws are placed in a box, easy to find and use. 4、Suitable for computer case, motherboard, hard drive, fan and floppy/CD-ROM/DVD-ROM drives fixed/installation, convenient to use. 5、228PCS computer screw set. Features: This is a screw set designed for desktop computer. The set includes: Mainboard insulation gasket, chassis hand screws, CD-ROM set screws, hard drive screws, conventional chassis fan retaining screws, mainboard fixed screws, brass standoffs screws, chassis high-strength screws. The screws are placed in a box, easy to find and use. Suitable for computer case, motherboard, hard drive, fan and floppy/CD-ROM/DVD-ROM drives fixed/installation, convenient to use. Specification: Type: Computer screws set Quantity: 228pcs 【Included】 Mainboard insulation gasket(M3x8): 30pcs Chassis hand screws(silver M3.5x5): 6pcs CD-ROM set screws(M3x4): 30pcs Hard drive screws(M3.5x5): 30pcs Conventional chassis fan retaining screws(silver M5x10): 24pcs Mainboard fixed screws(M3x5): 30pcs Chassis hand screws(black M3.5x5): 6pcs brass standoffs screws(M3x6+6): 24pcs Chassis high-strength screws(M3.5x6): 24pcs Conventional chassis fans retaining screws(black M5x10): 24pcs Box size: 13 * 7 * 2.3cm /5.12 * 2.76 * 0.91in Item weight: Approx. 197g /6.95oz Packing list: 1 * Set of screws 1 * Set of screws