TIMco Cross Recess Solo Wood Screw 20 x 3.5mm (L x Dia) Box of 200 is a zinc yellow passivated multi-purpose screw which is fully threaded which is easy to use and tough to remove. It is rust-free and is suitable for use in wood, plasterboard and sheet materials. The screw conforms to CE Marked, BS EN 14592:2008 for its load bearing capacity. The serrated grooves allow rapid low torque insertion into intended surfaces and provide high pull-out resistance. Corrosion resistant. Curved surface under head to prevent damage to surface. Specifically designed to be compatible with all leading power tool brands.