Ankerbolt is a Self Tapping Anchor. Countersunk Head Grade 8.8 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 6mm. Anchor length 75mm. Maximum fixture thickness 45mm. Minimum hole depth 40mm. Driver type T30 Torx. SSee Technical Data for Loads and Torque Settings