Sturdy and Durable- High quality carbon steel PC screw with anti-rust coating, superior rust and oxidation resistance, strong and durable. Multi-purpose - Computer screws range includes 9 types of PC screws with 12 case screws, 48 fan screws, 30 CD/DVD-ROM screws, 30 hard drive screws, 24 case screws, 30 motherboard screws, 24 brass standoff screws and 30 insulating washers to meet your different needs. Easy Installation - Sturdy material keeps all the screws messy, not easy to break with the screwdriver on the head, precise replacement part to replace the damaged part, perfect fit. Convenient Storage- All screws are packed in a transparent box with grid, well organized, convenient for your finding and using. Applications - This PC screw kit is perfect for fixed installation of computer cases, power supplies, motherboards, hard drives, fans and CD/DVD-ROM drives. It helps you maintain and clean as well as mount/upgrade your PC.