This Fischer concrete screw features a special saw tooth geometry for fast cutting into concrete. It offers up to 3 embedment depths, allowing the same screw to be used for different component thicknesses. The approved adjustment enables the screw to be unscrewed twice for alignment and then retightened. This screw is made of steel with galvanic/electrolytic zinc plating for surface protection. It has a hex head and an outside hexagon screwing system with a wrench width of 15mm. Pack of 50 pieces. Drill hole diameter: 10mm. Minimum drill hole depth: 70mm.