These StarTech.com computer screws are an essential for your toolbox if you're in the business of building, repairing, or maintaining computers. Shipped in a pack of 50, these M3 screws are 0.2 inches long and can be used to secure many PC components, including CD-ROM/DVD-ROM drives. With this handy pack of screws and your trusty Phillips screwdriver, you'll always be ready to replace a part or start a new build.