(Large diameter) the whole thread of the shelf (Anchor) Technical paramentsspecifications ourter diameter ultimate tensile breaking pitch(mm) Lengh BQD48 48 450KN 10 3m ,3.5m, BQD51 51 500KN 10 4m,4.5m,5m,BQD60 60 700KN 10 5.5m,6m,etcBQD73 73 800KN 10 or at customerBQD89 89 1000KN 10 's requirment BQD108 108 1200KN 10 (Large diameter) the whole thread of the shelf (Anchor)