SPAX Wirox T-STAR Washer Head Screws are corrosion protected construction screws designed for battens and squared timbers. They provide a secure connection with high load bearing capacity, making them strong and durable for demanding construction tasks. The 4CUT point ensures exact screw positioning, reduces wood splitting, and lowers the screwing-in torque required during installation. The T-STAR plus bit recess gives a secure fit and better driving, leading to quicker, firmer, and more efficient installation without annoying bit slips. These screws are partially threaded and do not require pre-drilling. The WIROX coating provides excellent corrosion protection.