These ForgeFix TechFast Window Screws are suitable for window/door frame construction and hardware fixing in PVCu. They have a pan head with TORX compatible recess and feature a self-piercing sharp point. 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. TX15 TORX compatible impact bit included. Size 4.3 x 25mm Bit Supplied TX15 Pack Box of 1000