The Thunderbolt Hex Masonry Anchor 12 x 100mm (Dia x L) Zinc Plated is a self-tapping anchor used on surfaces like concrete, stone, brick, wood and block. Thunderbolt provides a mechanical interlock between construction material and the fixing, with no expansion stress. High tensile strength of the bolt reduces high-energy forces within the concrete and is screwed through the fixture eliminating the need for pre-drilling or marking.

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