With the Spax universal screw 4.5 x 40 mm, you achieve strong and precise wood joints in interior fittings and covered outdoor structures. The partial thread draws panels and timber components tightly against the substructure without leaving gaps. Thanks to the t-star plus T20 drive system, your bit fits securely into the head, preventing cam-out and allowing optimal torque transfer while fastening. The countersunk multi-head sinks flush into the wood surface without splintering. Featuring the advanced Wirox coating, this steel screw provides durable corrosion protection for furniture assembly, framing, and decorative woodwork.