The Bossard 3373531 is an SPAX® screw for wood, designed with a countersunk 5x30 head, that is driven by a Torx® WIROX® interface. The screw is ideal for applications needing a fastener that is strong enough to secure heavy and dense surfaces, including OSB, Plywood, particle board, and other dense woods. The Torx® WIROX® interface is designed to withstand the higher torques of hardwoods, while ensuring a secure connection. The screw itself is made from a high-grade steel that provides excellent corrosion resistance and a long-term, secure hold on the surface.