These ForgeFix TechFast Cill Screws are suitable for fastening windowdoor cills to metal reinforced PVCu They have a bugle head with a TORX® compatible recess and feature a No2 drill tip for self-drilling into steel up to 3mm The screws are fire resistant and are protected by Elementech corrosion resistant coating which has been salt spray tested to 1000 hours They comply with EU safety health and environmental requirements TX20 TORX® compatible impact bit included