N-Durance Torx Concrete Frame Screws 7.5 x 122mm (100 Box) The N-Durance torx concrete frame screw offersa rapid and effective light duty anchoring system for fixing into concrete, brick, stone, concrete block and wood. The concrete screw features a 30mm hi-lo starting thread for rapid installation and debris removal whilst offering a safe and secure fixing into most substrates. This through fixing provides a single solution and replaces traditional fixings such as nylon frame and hammer fixings. Features: Lenght: 122mm Gauge: 7.5mm Drill Hole: 6.0mm for Brick, Stone, Concrete Block, Wood/6.5mm for Concrete Maximum Fixing Thickness: 70mm Specially designed self tapping masonry fixing Finish: zinc yellow passivated. Driver bit size: T30 torx bit fitting. Head Type: Countersunk Specification: Virtually stress free, allowing close to edge applications. Torx compatible head screw for increased torque control. High load capacity with interlockng thread into base material. Through fixing, eliminating the need for marking and re-postioning. Widely used for batten, window and door frame fixing. suitable for most masonry subtrates including concrete and brickwork In the box: 100 7.5 x 122mm Torz concrete frame screws 1 T30 Torx Bit 100 White Screw cap cover