With the Spax chipboard screw 4.5 x 25 mm, you create strong, durable timber joints for outdoor applications and humid spaces. Made from A2 stainless steel, it provides reliable corrosion resistance against weather and rust when securing timber or hardware. The full thread design delivers high pull-out resistance and a firm hold across the entire length, making it ideal for fastening thin boards and metal fittings onto wood. With the T20 t-star plus drive, you benefit from positive bit engagement and seamless torque transfer without slipping. The countersunk multikop head pulls neatly and flush into the wood for a smooth, splinter-free finish.