If you do any kind of construction, woodworking, or DIY projects, these self-drilling screws are incredibly handy to have around. This lot comes with 350 screws - #12 thread diameter, 2 inches long, with Phillips flat heads and a #3 point that drills its own pilot hole. The zinc plating provides good corrosion resistance, making them suitable for both indoor and outdoor projects. I've used them for building decks, assembling furniture, installing drywall, and all sorts of repair work around the house. The self-drilling feature saves so much time because you don't need to pre-drill holes, and the Phillips drive gives you good torque control. They work great in wood, metal, and various building materials. Having this many screws means you'll be set for multiple projects, and the flat heads sit flush for a clean finish. Seriously, if you're a serious DIYer or contractor, this bulk pack is a smart investment that'll save you multiple trips to the hardware store!