Shield Anchors Provide High Load Bearing Fixing Option For A Variety Of Application Types By Transferring The Load Across The Material. Sizes Available And Drill Size: M6 Anchor Uses 12mm Masonry Drill Bit; M8 Anchor Uses 14mm Drill Bit; M10 Anchor Uses 16mm Drill Bit; M12 Anchor Uses 20mm Drill Bit; M16 Anchor Uses 25mm Drill Bit.