Grip-Rite No. 8 wire X 1-5/8 in. L Phillips Wafer Head Cement Board Screws 5 lb 640 pk are used for attaching cement board to wood or metal studs. The screws are made of high-quality steel for durability and have a corrosion-resistant coating. The Phillips wafer head is easy to drive and the sharp point penetrates cement board easily. The screws are packaged in a reusable storage tub. There are many sizes and styles of nails available. As construction materials and techniques evolve, fastener design keeps pace with the changing technology.