TIMCO Multi Fix Concrete Screw 120 x 7.5mm (L x Dia) Box of 100 is zinc yellow passivated plated available in full thread. The pozidriv has four additional points of contact and the biggest advantage when used with the correct tooling, is that screw will not come out enabling great torque to be applied. It is ideal for door frames, window frames, lightweight steel angles, securing formwork, suspended ceilings and timber constructions. The screw also offers a rapid and effective light duty anchoring system for fixing into concrete,brick,stone, concrete block and wood. It uses a T30 drive to reduce driver wear and prevent camming out.