Hex Head Self Drilling Screws, with 5.5mm to 6mm thickness, are designed for heavy-duty fastening in metal, wood, and composite materials. Their hexagonal head allows easy torque application with a wrench or drill, ensuring a tight, secure hold. The self-drilling tip eliminates the need for pre-drilling, making installations faster and more efficient. These screws are ideal for roofing, steel framing, and industrial construction, providing exceptional strength and rust resistance for long-term durability. Whether you're working on a large-scale project or a home repair, these versatile fasteners ensure reliability and a professional-grade finish.