ForgeFix Concrete Frame Screws are suitable for most masonry substrates including concrete and brickwork. Widely used for batten, window and door frame fixing. These specially designed self-tapping screws are virtually stress free, allowing close to edge applications. Its torx compatible head allows for increased torque control. With a high load capacity with interlocking thread into base material. Through fixing, eliminates the need for marking and re-positioning. Finish: Zinc Yellow Passivated.