Daggerz™ Dagger-Tite post frame screws are a high quality screw designed for metal to wood applications. The type 17 point eliminates pre-drilling and provides seamless installation. The double-lead threads allow for fast, superior penetration. This pole barn screw features a high quality EPDM bonded washer seals around the screw to prevent any water leaks. The proprietary Dagger-Guard coating passes the 1000 hour salt spray test and provides excellent corrosion resistance that's suitable for exterior applications.