Ankerbolt is a Hexagon Head Grade 8.8 Self Tapping Anchor. Zinc Plated Clear Passivated. For use in a variety of base materials. The self tapping action provides a positive anchorage in concrete, brick, stone and hollow materials. Drill hole size 12mm. Anchor length 75mm. Maximum fixture thickness 15mm. Minimum hole depth 85mm. Driver type 19mm A/F. See Technical Data for Loads and Torque Settings