Topix-plus wood screw with countersunk head and milling grooves TX partial thread 4.5x45 mm blue galvanized, 500 pieces. Heco-Topix-plus is a true highlight in screws, combining concentrated technological expertise and a variety of practical user benefits in a single wood screw. The secret: Topix-plus merges the properties of four Heco product lines. With the innovative features of Heco-Drive, GripFit, MagicClose, and PerfectPitch, an integrated drive size concept, and high-quality system accessories, Topix-plus is the suitable wood screw for virtually all applications. One-handed operation is possible thanks to HECO-Drive, which securely holds stainless steel screws on the bit (from a screw diameter of 3.5 mm). The thread ribs reduce the screwing torque. The countersunk head with milling grooves offers excellent milling properties in wood and prevents surface damage to metal fittings. Chrome(VI)-free coating.