Used for attaching cills to the base of door or window frames. The self-drilling point permits the screw to drill through both reinforced and unreinforced frames. Approval All tested to BS EN ISO 9227:2006. UKAS Accredited. In accordance with BS 7412 and both the BPF and GGF guidelines. Corrosion Rating 2 - Occasionally damp/wet, rural and sheltered areas Description Used for attaching cills to the base of door or window frames. The self-drilling point permits the screw to drill through both reinforced and unreinforced frames. Driver Bit Size PH2 Finish Zinc Head Type Bugle Length mm 50 Material Carbon Steel Max Drilling Thickness mm 3.0 Pack Dimensions L x W x H mm 180 x 90 x 90 Pack Weight kg 1.897 Point Type Self-Drilling Product Code 225Z Recess Type Phillips Size mm 4.2 x 50 Substrates Steel Thread Dia. mm 4.2 Thread Type Self-Tapping