Quality Material: All computer screws are made of high quality brass, steel and fiber paper, steel with nickel and black zinc plated which have superior rust resistance and excellent oxidation resistance. Different Types: 228pcs computer case, power supply, motherboard, hard drives, fan, brass standoffs mounting screws and insulation washers. Sufficient Quantity: Our set contains a total of 228 screws. with sufficient quantity and complete variety, you can use it with confidence.Easy to Store: These Screws are packed in a plastic box, which is convenient for you to store and easy to store. Wide Applications: These hard drive screws are perfect for PC case, power supply, motherboard, hard drives, fan and floppy/CD-ROM/DVD-ROM drives fixed installation. Material: Metal Quantity:228pcs Package Includes: Main board conventional copper column (M3 6 + 6) : 24pcs Main board insulation gasket (Red M3 8) : 30pcs Main board fixed screws (M3 5) : 30pcs CD-ROM set screws (M3 4) : 30pcs Hard drive screw (M3.5 5) : 30pcs Chassis hand twist screws (silver M3.5 5) : 6pcs Chassis hand twist screw (black M3.5 5) : 6pcs Chassis high-strength screw (M3.5 6) : 24pcs Conventional chassis fan retaining screw (white zinc M5 10) : 24pcs Conventional chassis fans retaining screw (black M5 10) : 24pcs.Pengjun Ri store products.Pengjun Ri store products