Crafted for durability and precision, these zinc-plated steel machine screws provide reliable performance for all your fastening needs. With a combination round head design, they offer a secure fit and are ideal for a variety of applications. The 3-1/2 inch length ensures versatility, making them perfect for both home projects and professional use. Packaged in a convenient 100 pack, these screws are essential for any well-stocked toolbox.