ForgeFix TechFast Baypole screws are self-drilling screws suitable for joining bay window and other metal-reinforced PVCu sections. They feature a wafer head with a TORX compatible recess and a No.3 drill tip for self-drilling into steel up to 4mm. These screws are fire resistant and protected by 'Elementech' corrosion-resistant coating, which has undergone 1000 hours of salt spray testing. They comply with EU safety, health, and environmental requirements. An TX25 impact bit is included.