Introducing the Red Head Phillips Anchors CAT No.8 M4 Stud Size 8x37mm (45pcs) that are perfect for all your fastening needs. These self-drilling screws have been manufactured by Phillips Drill Co. with high-quality steel materials to ensure durability. The screws come in a pack of 45 and have a thread size of 25mm. These screws can be used in a variety of industries and are easy to install. Made in the United States, these screws have been designed to provide your project with secure and reliable fastening.