Specially designed self-tapping masonry fixing. T30 Bit included in boxed product. Finish: Zinc Yellow Passivated. Virtually stress free, allowing close to edge applications. Torx compatible head screw for increased torque control. High load capacity with interlocking thread into base material. Through fixing, eliminating the need for marking and re-positioning. Widely used for batten, window and door frame fixing. Suitable for most masonry subtrates including concrete and brickwork.