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 8mm. Anchor length 100mm. Maximum fixture thickness 60mm. Minimum hole depth 55mm. Driver type 15mm A/F.